Water Heater T&P Valves. I head down to take a look and the Hot Water Heater is now leaking out of the pressure relief valve. Safety – With tankless water heaters there is virtually no chance of you child or anyones else being scalded by hot water out of the tap. Monitor the valve for leaks. The more this diverter valve leaked internally, the cooler the diluted hot water got at the faucets. No safety relief valve can be smaller than NPS 3/4. If leaks of pressure relief valves are connected to the safety of water heaters when being used, leaks that are confirmed to be coming from the tanks of a water heater are involved not only in the safety but also its function. Temperature, pressure, or a faulty valve. ASME, ANSI and CSA (AGA) approved relief valves protect the water heater from excess pressures and temperatures by discharging water. If water issues from the temperature/pressure relief valve or from the expansion valve, if installed,switch oft electricity. Back To Technical Bulletins Bulletin 5 Leaking SYMPTOMS Puddle on Floor Water in Drain Pan Leak from Fitting T & P Valve Leaking CAUSES Fitting is leaking around the threads Tank has pin hole leak Thermal Expansion Excessive water temperature. Watts® Pressure Relief Valve - 30 PSI. RV Water Heater Bypass Systems. High water pressure can compromise the durability (and the performance) of the system, potentially causing the tanks temperature pressure relief valve to leak as well as shower heads and faucets. You may find that it reseats itself and stops leaking. The threads of the valve & the outside of the drain pipe are not wet at all. In many homes, this heated water manages to dissipate some of the heat backward and hence towards the mains. This entry was posted in DIY and tagged fix leaking TPR valve hot water heater hot water tank hot water tank leak plumbing pressure relief valve Repair repair hot water tank temperature pressure relief valve tpr valve Watts on November 15, 2013 by Steve Jenkins (updated 1917 days ago). We are here to tell you that it is okay for some water heaters to be without temperature-pressure relief valves. Gas and electric water heater leak repair guide. After letting it settle for 24 hours, there is a black sediment/soot looking material at the bottom whereas the top layer of water is crystal clear. Thus if the water is from the T&P relief valve then I go with Jack "It also could be a faulty TPR". If the pressure inside of your water heater has gone too high, the pressure valve will start to drip or leak. Why Would a Pressure Relief Valve Leak? Pressure relief valves are safety valves used to control the pressure of the liquid. You should turn off the water heater, including the water supply, and contact a plumber to have the relief valve repaired (or possibly even replaced). Do I just replace the valve or is something else causing it. Residen al Electric Water Heater Use and Care Guide • 5 precau ons are par cularly important. Turn on the water supply valve. Shop our selection of Rheem, Temperature Pressure Relief Valve, Water Heaters in the Plumbing Department at The Home Depot. Mine started leaking at about the 7 year mark, through the plug valve washer, but recently the valve sprung a second leak and was leaking right at the threads so it had to be removed. This leads us to the next problem with excessive temperature usually comes excessive pressure. If you experience a leaking water heater, it is recommended to turn off the water to your tank. Pressure relief valve with fast drain for a Carver Cascade water heater. This leads me to believe there is a leak in the tank itself, but it appears it only leaks when the system is under pressure, either using the pump or an outside water source and the leak is not present when the water is heating by either gas or electric sources. To help you shop for a new water heater, check out these resources: Water Heater Buyer. While you are doing this you can leave the vent on the safety relief valve open in order to facilitate filling the tank and prevent air bubbles in the system. I will have to have a plumber come out and take a look at it. There is a very small leak of rusty water dripping down the side of the water heater, coming from where the temperature and pressure relief valve attaches to the tank. Whether you have an electric or a gas water heater that’s leaking from bottom, making use of the information below can save you quite a bit of money and trouble. If the drain valve fails, all the water stored in your hot water tank will flood your basement. So what do you do if you have high water pressure?. For best results, use a 3/4 FIP or MIP brass x 3/4“ compression union. This is usually located on top of the water heater. Rental water heaters are not acceptable. The leaking is very small, it is about 100ml for one day. Most valves in a residential plumbing system are part of the water supply system and are used to control the flow of pressurized water from the water utility or a private well. Open the pressure relief valve to release any pressure in the system; Rinse with cold water to quickly get water temperatures down. It flows over the top of the inside tube and the collects in the outer tube until the pressure is enough to open the valve. this can result in serious damage to the tank. You can control the output temperature directly on the tankless water heater, so you know how hot the water being delivered to your taps will be. After writing a blog post about leaking temperature and pressure relief (TPR) valves at water heaters, I learned that this particular issue seems to completely befuddle folks. In fact, this is one of the situations in which you want to act quickly. 2 Drain the water from the tank till the water level is below the valve's location. Once all that is done, the water heater could be slid out of the trailer wall. If you notice that your hot water heater pressure relief valve is leaking, then it's time to replace it. The valve is a safety device to prevent the tank from rupturing in case of runaway temperatures or an unsafe pressure build-up. Remember, if the leak is from the TPR valve, it could be caused by excessive pressure inside the tank or overheating. These valves cost less than $15, and replacing the valve is a very basic job - just drain some water out of the water heater, remove the discharge tube, and replace the valve. This valve protects the water heater, by relieving pressure and allowing water to escape, as the water inside the cylinder expands due to heating. Discharge from a relief valve into a water heater pan shall be prohibited (CPC 608. Recently there have been several claims against ‘leaking’ TPR valves. MHT measurements. MAINTENANCE. Water on the floor. TECHNICAL BULLETIN BULLETIN 52 LEAKING TEMPERATURE AND PRESSURE RELIEF VALVE SYMPTOMS • Water seeping around the relief valve tank connection • Leakage at the threaded portion of the relief valve connection • Intermittent weeping and/or dribbling from the relief valve • Large volume of hot water sporadically discharged from the relief valve. Here are a few signs your water heater will give before going burst. It is also a very simple problem. Testing Your Temperature/Pressure Relief Valve. Replace and poss install expansion tank or at least thermal expansion fill valve for toilet. The amount. If you pressure relief valve is leaking, pop it open a few times using the manual actuator. Depending on the. The pressure relief valve (T&P valve) is an essential security measure to the water heater to relieve excessive pressure in the event the water heater becomes too warm. the water heater and purge the air out of the lines before allowing the unit to power up. If your water heater relief valve is leaking you need to call a service technician to properly troubleshoot and repair the problem. During an early spring RV trip the hotwater pressure relief valve would not stop leaking. The threads of the valve & the outside of the drain pipe are not wet at all. E Rated*, CSA Listed. So he put another brand new pressure relief valve on the brand new water heater and did that 3 times before he figured it has to be something else. An overflow line should be utilized from the relief valve outlet to a floor drain. This is the valve located at the top of the water heater and is connected to a pipe that runs down the side of the tank. Hi, We have a megaflo unvented water heater in our apartment, and it started dripping water from the pressure relief valve some time ago. Water Supply Faster installations, fewer leaks and callbacks! • Full port, quarter-turn ball valves with color-coded tee handles for fast water heater isolation • Quarter-turn purge and drain valves with hose bib connections and tethered brass caps • Includes integral ¾-inch FPT relief valve port in hot water supply valve. The T&P relief valve is a safety feature that opens to let hot water out of the water heater if the temperature or pressure inside the water heater tank gets too high. A leaking water heater can flood your entire home if not replaced immediately. I have had 4 different plumbers check this out, they put a new regulator at the water meter, turned the temp of the water down, replaced every thing in the old heater. A leak does not always doom a hot water tank. Flexcon WH & WHV tanks are shipped with an air precharge of 40 PSI. We are here to tell you that it is okay for some water heaters to be without temperature-pressure relief valves. This temperature is indicated on the water heater. Just get a new valve, identical to the one you have and preferably of the best quality. If either of these develop in the system, the valve will open and discharge water. What is the purpose of a vacuum relief valve?. An important safety component of your water heater, the temperature and pressure relief valve is required. Insert the new rod into the tank drain and tighten the plug being careful not to cross-thread the plug. The most difficult aspect of the design and sizing of pressure relief valves is ascertaining the controlling cause of overpressure. It is important to ensure that the pipes supplying the water heater are in good working condition. It is not to be used as an alternative to a professionally engineered project drawing. How to Install a Water Heater Gas Valve. During normal operations of the water heater , water should not be leaking from the T&P valve. These devices are the first line of protection against water heater explosion. That is either located in the boiler ("tankless coil") or in an indirect water heater next to the boiler. This is a quick guide meant to act as a state select water heater troubleshooting guide. Water Heater Explosions. A failure in the temperature pressure relief valve could cause an explosive effect suddenly. Figure 4: Water heater tank burst causing significant damage to the surrounding property. These valves may look identical, but they're set to go off at 30 psi, not 150 psi. This is a safety measure that prevents your water heater from posing a threat to your home, and it’s the most likely reason your water heater is whistling. If it leaks, then it can do quite a bit of damage in just a short amount of time with just the water that is leaked. Replace the valve. What to do With a Leaking Water Heater STEP 1: Turn off the water. As such, many people are surprised to learn that some ,models of tankless water heater do not have pressure relief valves. A while ago we noticed cold water dripping through the tundish. Leaking pressure relief valve; The pressure relief valve is usually located at the top of heater, on the side. Lift lever on relief valve to relieve trapped air. Have a plumbing professional replace the valve if needed. This temperature is indicated on the water heater. 6 meters of 20mm copper pipe) of water due to thermal expansion. Your trouble is not there. So it should drip whenever the water is being heated unless you have a tap turned on which would let the pressure out that way. Now, it seems to have more drops coming from the pipe. An expansion tank or expansion vessel is a small tank used to protect closed (not open to atmospheric pressure) water heating systems and domestic hot water systems from excessive pressure. Occasionally, leaks can be found coming from a fitting (such as around the Temperature and Pressure Relief Valve) or around one of the heating elements. The temperature is set on a. My water heater is about 10 years old. With both water pressure and tank heater off, I don't see any leaking -- at least MUCH slower. If you don't want to read the code skip to the bottom for a summary. Pressure relief valves sometime develop a drip when opened for the first time in years. Begin by inspecting the water pipes leading into the heater, the flexible connectors and the shut-off valve. You can buy valves through online appliance parts dealers (using your water heater's model number), or simply take the old valve into a local home center or plumbing supplier to find an exact replacement. It was just installed three days ago. How To Flush & Drain Your Water Heater. not have a threaded connection at the end of the pipe so as to avoid capping. Leaking Pressure Relief Valves in Water Heaters. Replacing the Valve. Rated 5 out of 5 by RonC from Used this on a RHEEM Marathon 85 gallon hot water heater after the one that came with the heater. Near the bottom of every water heater tank is another. Depending on where the leak occurs, you may be able to fix the problem before scrapping the tank. We asked for this to be added and the sellers told us that per the codes for tank-less hot water heaters (California) a pressure relief valve nor a discharge line are needed. In this example, the relief valve should be at 40 psig or higher. It will help you figure out and fix some of the most prevalent problems facing water heaters, including tank leaking, sediments and lime buildup, gas valve problems, hot water heating, pilot light issues and thermocouple replacement and various other […]. Whether you have an electric or a gas water heater that's leaking from bottom, making use of the information below can save you quite a bit of money and trouble. ASME, ANSI and CSA (AGA) approved relief valves protect the water heater from excess pressures and temperatures by discharging water. Water heater temperature and pressure relief valves, or T&P valves, are a safety feature found on all tank water heaters. This temperature is indicated on the water heater. The T&P valve protects the water heater by automatically discharging water when the pressure or water temperature becomes too high. There are a couple of main reasons why your relief valve may leak. Turn the cold water valve on to flush out any remaining sediment. Hello, my water heater is gas and about 10 yrs old. You should turn off the water heater, including the water supply, and contact a plumber to have the relief valve repaired (or possibly even replaced). If the temperature and pressure relief valve leaks even though it has not reached the indicated relief temperature, replace it. Back in the good ol’ days all water heaters were thermostatically controlled manually. The home I’m purchasing has a Takagi tankless water heater but does not have a temperature/pressure relief valve or a discharge line. Since most newer RV water systems don't have accumulator tank or water hammer. All hot water heaters are sold. Leaving the problem could cause permanent damage to your water heater and even lead to water damage to […]. Pilot Will Not Stay Lit – I think most of us who have dealt with water heaters have experienced this, it’s super common. I had the water utility company check the pressue and it was fine. This drain valve can be capped with a hose cap, or you can replace the drain valve completely with a new and improved valve. Know where the shut-off is located for fuel (gas or electric). Heather, Yes, the majority of problems are the hose connections. Mine is in the attic. Replace the valve. Before looking at our water heater pressure relief valve leaking after testing situation, we must confirm whether the valve is working regularly or not. Dry it and put it back into the inlet port, close the drain plugs, and replace the caps. The water heater’s Temperature Pressure Relief Valve (TPRV) extension pipe is routed upwards. There are many codes, and they change. This was fine for about 2 weeks. Leave cold water valve open. Family Handyman. As such, many people are surprised to learn that some ,models of tankless water heater do not have pressure relief valves. What to Do if Your Hot Water Heater in Independence Leaks. I think my leak is coming from the temperature and pressure relief valve. After lowering the temperature, turn on the water at the cold water inlet valve and power/gas to your water heater. TECHNICAL BULLETIN BULLETIN 52 LEAKING TEMPERATURE AND PRESSURE RELIEF VALVE SYMPTOMS • Water seeping around the relief valve tank connection • Leakage at the threaded portion of the relief valve connection • Intermittent weeping and/or dribbling from the relief valve • Large volume of hot water sporadically discharged from the relief valve. It may be provided with an enclosed spring housing suitable for closed discharge system application and is primarily used for liquid service. If your valve is opening, please call the heater manufacturer for assistance in. It was just installed three days ago. The water heater is thermostat should be set at the lowest possible temperature which will provide sufficient hot water. Check for gas leaks before placing water heater back in operation. Turn the water back on, open the repaired water valve and check for leaks. The other way to catch leaking water from the TPR valve is by collecting the water with a pan underneath the heater. Water is spraying from the pipes or water heater. On closer inspection i found that the hot water heater pressure relief valve leaking. The TPR valve is attached to a discharge pipe that aims the overflow at the floor or ground where your hot water heater is positioned. every six months may result in the water heater splitting. Marathon water heater models changed in March of 2009 to require a different vacuum relief valve. Pressure Relief Valves vary in BTU capacities, and should be selected based on the capacity of your heating system. Hot water increases the risk of injury by scalding. Look for your TPR valve either on the top of the water heater (seen above) or on the side of the tank. When water gets heated inside the heater, it expands and naturally takes up more space thus exerting more pressure on the relief valve. We discovered that we were getting water leaking out of the pressure relief valve/pipe about a cup per day. From there, the valve that is at the very bottom will need to be opened up. These valves may look identical, but they’re set to go off at 30 psi, not 150 psi. Heater too small, replace with larger capacity model; Pressure relief valve is leaking. Learn why you might want to consider replacing your water heater if you've had it for 10 years or more. I head down to take a look and the Hot Water Heater is now leaking out of the pressure relief valve. I flipped the control lever open and let it snap shut several times, but the leak continued. Series 100XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 105,000 BTU/hr. How to Test Temperature and Pressure Relief (TPR) Valve. The pressure relief valve is on the side of you hot water tank near the top. Water Supply Faster installations, fewer leaks and callbacks! • Full port, quarter-turn ball valves with color-coded tee handles for fast water heater isolation • Quarter-turn purge and drain valves with hose bib connections and tethered brass caps • Includes integral ¾-inch FPT relief valve port in hot water supply valve. The T-and-P valve, which is located on the. Get shopping advice from experts, friends and the community! I have a 50 gallon Whirlpool water heater, model # FG1F5040T3NOV. Water leaks can be caused by a faulty temperature and pressure (T&P) relief valve, excessive pressure, overheating, a stuck valve, a leak from an overhead or adjacent plumbing connection, loose heating element bolts, a bad gasket or a leaking water tank. The increased water pressure opens the pressure relief valve and water can escape to the. Finally, remember to turn the water heater back on as the last step of the process. Immediately after the tank and before the tubes wonder off. To do this you need to "add some air" into the water heater because if there is no air in the water heater to compress when the water gets hot the valve will leak. Then unscrew the old valve from the heater by using a large pipe wrench and turning counterclockwise. Rheem water heater troubleshooting allows you to find pressure relief valve to some common issues or indicates professional repair or replacement is needed. Lochinvar Welcomes VIP Contractors for Sold-Out CMA Fest 2019 Lochinvar recently hosted 14 of its top VIP Contractors and their guests for its annual four-day Nashville Experience in celebration of their support of the widely known residential boiler rewards program. the installer or end user of the water heater with a locally pre-scribed temperature-pressure relief valve installed in the desig-nated opening in the water heater in place of the factory fur-nished valve. Turn the cold water valve on to flush out any remaining sediment. " When the pressure builds up inside of your water heater, the TPR valve releases it. To replace the packing washer, remove the handle and packing nut. Leaving the problem could cause permanent damage to your water heater and even lead to water damage to […]. Water Heater T&P Valves. The following list is one that tells you about the four most common issues that can cause water heater leak. If you don’t want to do this yourself, please contact a professional Lawton, OK area plumber for help. After lowering the temperature, turn on the water at the cold water inlet valve and power/gas to your water heater. Winterizing the Water Heater and Fresh Water System 1. To check the T&P valve, place a bucket under the overhead pipe, open the valve and flush it. Leaking Pressure Relief Valve A water heater must be installed with a temperature and pressure relief valve(T&P) to ensure that dangerous overpressures don't cause an explosion. By the time you order a tank, and have a technician completely dismantle the water heater, you’ll have as much money involved as what it would have cost you to just replace the water heater itself and start with a brand new one. This is not the case for leaks that are confirmed to be coming from the tank of a water heater. When the tank heats up water, the water will expand and the pressure will increase. Use check valves to isolate flow in in only the powered zone. If your hot water tank is leaking, the issue could be with the pressure relief valve. After draining or flushing a water heater, it is common for the drain valve to fail to close completely. it heater has been drained and off for about 6 mts, when I filled it up and it got hot it started leaking, now that it’s cooled down it’s still leaking but slower. Water valve cutaway showing packing washer. I have noticed a little water leaking our of my pressure relief valve on my water heater. If your gas hot water heater is leaking, turn off the gas valve beside the heater to isolate the gas supply. The supplied 6 bar pressure relief valve must always be fitted. Water Heater Relief Valve Replacement. Trouble Shooting guides are intended for use by Licensed Professional Installers. You may find that it reseats itself and stops leaking. pressure water heater installation if the water pressure exceeds 80% of the nominal set pressure of the operating relief valve, a Pressure Limiting Valve must be fitted to the cold inlet. For safe operation of the water heater, the relief valve must not be removed from it’s designated opening or plugged. Commonly will be a lime buildup where the water is flowing and evaporting. To keep your water heater running safely and effectively, periodically check your water heater's temperature pressure relief valve to make sure that the pressure in the water heater's boiler doesn't get too. an temp/press relief valve leaks due to bad seal or thermal expansion. On most water heater models, there is a safety device known as the temperature-pressure relief (“T & P”) valve located near the top. We had the valve replaced last christmas (it tripped while we were on vacation), so I'm sure the valve is fine but now I'm not sure what is going on. My water heater is about 10 years old. It may not be anti freeze , but it tasted like it. The tank is partially filled with air, whose compressibility cushions shock caused by water hammer and absorbs excess water pressure caused by thermal expansion. After lowering the temperature, turn on the water at the cold water inlet valve and power/gas to your water heater. Replace and poss install expansion tank or at least thermal expansion fill valve for toilet. Locate the fresh water tank drain valve or plug and allow the fresh water tanks to drain until approximately 115% to 120% of the water heater capacity remains in the tanks. A few ship without. Hi, We have a megaflo unvented water heater in our apartment, and it started dripping water from the pressure relief valve some time ago. Water Heater TPR Valve Information. ECV Function. If the connection is too loose, simply and carefully tighten the connectors. When they leak, the higher pressure in the domestic water leaks into the boiler, causing it to over-pressure. When connecting the inlet water pipe to the unit, make sure to use a wrench to hold the unit’s connection, and another wrench to tighten, so that the flow sensor on the unit will not be loosened or damaged. When a temperature and pressure (T&P) relief valve at a water heater leaks, it's usually a simple fix; just replace the valve. Recently there have been several claims against ‘leaking’ TPR valves. Hi, While changing my steam boiler water, I noticed the floor a little wet next to the water heater. Step 3 - Prepare Valves. I flipped the control lever open and let it snap shut several times, but the leak continued. Rated 5 out of 5 by RonC from Used this on a RHEEM Marathon 85 gallon hot water heater after the one that came with the heater. However, if you are unsure you may want to consider calling a professional. You should turn off the water heater, including the water supply, and contact a plumber to have the relief valve repaired (or possibly even replaced). be piped independently of other equipment drains, water heater pans, or relief valve discharge piping to the point of discharge. Residential hot water heaters have a pressure relief valve on the side of the tank, which functions as a safety device to keep the tank intact in the event of a buildup of pressure. You probably have scale deposits on the tank or heating elements. I have a leaking pressure relief valve in a electric hot water heater. Pull the tab out on the pressure relief valve. The Water Heater Drain Valve fits directly into your water heater. Is the electric water heater pressure relief valve leaking again and again? If it works with the valve replacement, then congratulations to you, there is nothing to worry about. The temperature and pressure relief valve (the TPR valve), often called the temperature and pressure valve (T&P valve) is a water heater safety device designed to relieve the pressure from water heaters in case of an extreme temperature/pressure rise (anything above 150 psi, is explosive, if you're curious). Hot water increases the risk of injury by scalding. If the system pressure is 30 psig and the relief valve, rated for 40 psig, is leaking, the relief valve is most likely defective. • never operate an empty or partially filled water heater. Test it regularly - it should release some water when you flip the lever and then go back into place. The pipe must be no more than 6″ from the floor to prevent a scalding injury should the valve open. This is not the case for leaks that are confirmed to be coming from the tank of a water heater. Watts® Pressure Relief Valve - 30 PSI. But I think, if it continues to leak have a plumber replace the valve especially if its over 5 years old. valve will open when the gauge pressure reaches 30 psi. I came home tonight and noticed a puddle of water next to my Wail-McLain boiler. Wiring up the New RV Water Heater. A leak does not always doom a hot water tank. The first places to check if it appears that you have a leak from the bottom of your water heater are the drain valve and temperature & pressure relief valve (T&P valve). bad ex tank and relief replaced to get system up and running properly. In fact, this is one of the situations in which you want to act quickly. The T & P valve, which stands for temperature and pressure relief valve, is a safety device that protects against excessive temperature and pressure levels in the leaking water heater. The other way to catch leaking water from the TPR valve is by collecting the water with a pan underneath the heater. Water Heater Leaking from Top Cold Water Inlet. May Be a Defective Valve. To see if your water heater valve leaking is a simple and easy. In the first case, the valve will drain water out of the discharge pipe as explained above. Open a hot water fixture and allow water flow until all air is removed from the system. If there is a lot of water on the floor, your hot water heater is leaking or cracked. See EXPANSION TANK WATERLOGGED, RELIEF VALVE LEAKS for examples of TP valve leaks caused by waterlogged expansion tanks. Today, with the prominence of electronic ignition, manual control of the temperature of the water is taken away. There are three FHA requirements for water heaters. In this example, the relief valve should be at 40 psig or higher. Do not solder any pipes with the unit connected to pipes – heat from soldering may damage the flow sensor. • do not attempt to operate this water heater without a properly installed temperature and pressure relief valve. He came in and put a brand new water heater in and the pressure relief valve on the brand new water heater started leaking just as the old one did. still leaks. To replace the packing washer, remove the handle and packing nut. Many households are on a strict budget. If you experience a leaking water heater, it is recommended to turn off the water to your tank. Your water heater relief valve has a vital role to play where safety is concerned. Most water tanks come with a relief valve. A leaking water heater can be a symptom to a more serious problem, so it's important to always keep a close eye on your heater after performing any repairs. If you don't want to read the code skip to the bottom for a summary. Does your hot water system have a leaking valve? Should you worry about this? In this video, we'll go through the reasons what causes this leaking valve. If the pressure relief valve will not seat properly, or it is still venting when there is no pressure build up, you will need to replace it. Rental water heaters are not acceptable. The supply pipes delivering water to the water heater are leaking at their connections, the pipes themselves are leaking, or there is a leak inside the water heater tank. Follow the below steps to replace your leaking pressure relief valve, Drain the water tank it should be below the TP level you can do this by opening your tape just to release the pressure and reduce the water from within the tank. Leaking Pressure Relief Valve A water heater must be installed with a temperature and pressure relief valve(T&P) to ensure that dangerous overpressures don't cause an explosion. If there is a lot of water on the floor, your hot water heater is leaking or cracked. Leaks can be caused by all kinds of things: Sediment in the water heater can cause the pipes and pipe fittings to erode or can build up around the pressure relief valve and cause a leak there. This entry was posted in DIY and tagged fix leaking TPR valve hot water heater hot water tank hot water tank leak plumbing pressure relief valve Repair repair hot water tank temperature pressure relief valve tpr valve Watts on November 15, 2013 by Steve Jenkins (updated 1917 days ago). RV hot water problems are an inconvenience, so check out these RV hot water heater troubleshooting and parts tips and hints to help you figure out what is going on. Suburban Water Heater 161230 Lead Free 3/4" Pressure Relief Valve Description A temperature and pressure relief valve protects the water heater from excessive temperatures and pressure. He pretty much said the same thing as all of you. it heater has been drained and off for about 6 mts, when I filled it up and it got hot it started leaking, now that it’s cooled down it’s still leaking but slower. Prior to storing the RV for the winter, all tanks are emptied to prevent damage from freezing (see Reference 1). When a temperature and pressure (T&P) relief valve at a water heater leaks, it's usually a simple fix; just replace the valve. read : Is your hot water heater leaking from overflow pipe. Get tips on how to clear debris from the valve to possibly fix the leak. failure of the operating relief valve (see table). I will have to have a plumber come out and take a look at it. Depending on the style of water heater, there can be a number of culprits. If the T/P Relief Valve continues to leak, it should be replaced. Well, let's see. Otherwise, water will run out the valve and. Do I just replace the valve or is something else causing it. I have placed a small bucket underneath the drain pipe opening.