I have a gas A O Smith water heater. After that it can be a weak relief valve spring or damaged valve seat. If you prefer, you should contact a licensed plumber for the replacement of your temperature & pressure relief valve.eval(ez_write_tag([[250,250],'homeinspectioninsider_com-large-mobile-banner-1','ezslot_3',163,'0','0'])); Are water heater expansion tanks required? Old or neglected tanks can develop pinhole leaks at the bottom of the tank, where sediment and minerals collect. We are here to tell you that it is okay for some water heaters to be without temperature-pressure relief valves. You don’t need to turn the gas all the way off. Locate and close the cold water shut-off valve entering the water heater. When a temperature and pressure (T&P) relief valve at a water heater leaks, it's usually a simple fix; just replace the valve. Smith Water Products Company FPD, FPST, FPSH, FPSE, water heater (White paper, black print, star in a circle logo in lower, Installed, new, temperature and pressure relief valve 12) Installed expansion tank-necessary 13) … View Document Check for leaks or dripping around the repaired valve. As water is removed through the T&P valve, cold water enters through the inlet and mixes with the water in the tank. For a gate valve, turn the valve clockwise to close. It still hasn’t fixed the problem can you please give me some insight on my problem because I have ran out of ideas to fix … Temperature/Pressure Relief Valve Leaks at a Water Heater. An important safety component of your water heater, the temperature and pressure relief valve is required by every plumbing code. In the event that the temperature of the water in the tank rises above a preset value -- usually 210 degrees Fahrenheit -- or the pressure rises above 150 psi, the valve opens, thereby averting a possible … Smith GPVL-50 service handbook online. Temperature & Pressure Relief Valve. If leaks are found you'll need to shut down the system, let it cool, remove water pressure and water, and repair the leak. Part of the valve extends into the unit. 1. Open the drain valve on the water heater then open the hot water tap at a nearby sink to release the vacuum on the tank. If you have an electric water heater, you’ll need to locate the 220 circuit breaker for the water heater and turn it off. The valve is located on or near the top of the tank. Smith Water Heaters When the heater is leaking. This valve will release water from the tank if the pressure is too high or the temperature is above 210º F. Make sure your thermostat is not set too high. View and Download A.O. .banner-1-multi{display:block !important;float:none;line-height:0px;margin-bottom:15px !important;margin-left:0px !important;margin-right:0px !important;margin-top:15px !important;min-height:400px;min-width:580px;text-align:center !important;}eval(ez_write_tag([[250,250],'homeinspectioninsider_com-banner-1','ezslot_8',160,'0','0']));eval(ez_write_tag([[250,250],'homeinspectioninsider_com-banner-1','ezslot_9',160,'0','1'])); The final possibility is that the valve has failed and is in need of replacement. Copyright © 2021 HomeInspectionInsider.com, Step 3: Drain about 10 gallons from the water heater, Step 4: Remove the temperature & pressure relief valve, link to Are Ungrounded Outlets Safe? Luckily, we’re here to help. This valve protects the water heater, by relieving pressure and allowing water to escape, as the water inside the cylinder expands due to heating. If the valve is in line with the pipe, the water is on. It works by activating a spring when the pressure builds and releases pressure out of the tank. We can help!Get a free estimate from top-rated, screened, and licensed plumbers in your area! Most cities require residential plumbing systems to be closed water heater systems. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. Some times the relief valve or blow off valve will leak, and naturally people assume that it is because the relief valve is defective. Relief valve customarily set on the hot water outlet from where the pipe is leaving the heater to faucets. As I said, the temperature would need to be near the boiling point of 212 degrees to set off the valve. Let's Fix Them Right. The temperature and pressure relief va... lve opens at a set temperature. Water heater explosions are rare but when they do happen, they can be devastating. At least 6 monthsrust marks do the side. The second reason a water heater relief valve leaks is, The water has gotten too hot, if the temperature of the water in the water heater reaches above 210 degrees F the relief valve will leak or even blow off, this is why the outlet of the relief valve must be piped to about 6 inches from the ground, you would not want to get a blast of 210 degree F water … Hello all, I have a slight issue with my gas water heater. This temperature is indicated on the water heater. Most replacement T&P valves cost approximately $30 or less, and the replacement process is pretty easy. Be sure the T&P valve is pointed downward. That being said, it’s still a possibility, so it would be wrong not to cover it here. This is needed to prevent the water heater from continuing to produce hot water while working on the water heater. eval(ez_write_tag([[468,60],'homeinspectioninsider_com-medrectangle-4','ezslot_6',158,'0','0']));While there are plenty of locations at which you can connect the gauge to your plumbing, the easiest option is to connect it to one of your outdoor hose faucets. Not all water heaters have an expansion tank, but if yours does, it's function is similar to that of the T&P relief valve. The pressure relief valve is on the side of you hot water tank near the top. A leaking temperature and pressure (T&P) relief valve on your water heater can be a perplexing problem. There are two types: The T&P valve with a short shank like the Camco 10471/10473 3/4″ Temperature and Pressure Relief Valve with 4″ Epoxy-Coated Probe fits most all water heaters that have a short shank. You may have to cut the pipe off in some instances. Tankless. If you’ve exhausted all of the other possibilities mentioned in this article, replacing your T&P valve is is probably the best solution. If your water heater is installed in an attic or ceiling space or inside the interior living space, a drain pan is required under your water heater. Unfortunately, the damage caused by years of non-use can be tough to fix. The most common reason for replacing the temperature and pressure relief valve is when the water heater is leaking. If there has been any time at all in between the installation of your water heater and the moment your valve started leaking, you almost certainly have the right kind of valve installed. This will prevent leaks. Boiler pressure valves typically release water and steam at 30 psi, not the 150 psi typical of water heater valves. There is a simple test to determine whether the TPR valve is operating correctly. Other appliances ‒ like boilers, for example ‒ also use pressure relief valves. On the other hand, if the relief valve is stuck or has another problem, it needs to be fixed or replaced right away so it can do its job properly when necessary. If installing an expansion tank doesn’t solve the problem, the tank may have been installed incorrectly. AO Smith 9003741005 - 3/4", 150#, Temperature & Pressure Relief Valve - T & P Relief valve Dripping T&P relief valve on AO Smith water heater [ 2 Answers ] I own a 2 year old 2 family house. Long runs of exposed piping 11. Some times the relief valve or blow off valve will leak, and naturally people assume that it is because the relief valve is defective. Now, it seems to have more drops coming from the pipe. We are here to tell you that it is okay for some water heaters to be without temperature-pressure relief valves. A t’stat that fails closed or on, so that it’s heating all the time is the answer most in need of immediate attention. HomeInspectionInsider.com is owned and operated by Hubert Miles is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. If your valve is set to a different set of specifications, you might have a valve intended for a different appliance. If the water heater pressure relief valve is too old, it has a much bigger chance of leaking. While settings can vary between different brands and models, the valve is typically set to open when the temperature exceeds 210 degrees and the pressure exceeds 150 psi. It will either be a ball valve or a gate valve. 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 It's a very important part of your heating system. I've been conducting home inspections since 2002. Bulletin 41 – A.O. You will initially need to use some force to break the seal. Click here to purchase part #9000728015: If the pressure relief valve on a boiler system chronically leaks, even after replacement, it probably means there is a problem with the expansion tank. If the water in the heater reaches a temperature of 210 degrees F, the T&P valve will open and release water until the water temperature is reduced. Every water heater, whether gas or electric, needs a temperature and pressure relief valve, because without one, it could begin to leak or even explode. Contractor's Assistant: How long has this been going on? I opened the valve and brown water came out. If you are more comfortable turning off the gas, by all means, do so. One of the most common causes of water heater leakage is a loose drain valve. During its passage, there is several joints and valves are acting. 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