How to Test a Water Heater Relief Valve

Подписаться 4,4 тыс.

Просмотров 51 тыс.

50% 1

A water heater’s temperature and pressure relief valve is a critical safety device that you will want to work properly if it is ever called upon to relieve excess pressure from your water heater to prevent a possible rupture or explosion. The pressure relief valve is designed to open and relieve pressure if the pressure in the water heater reaches 150 psi or if the temperature reaches 210°F. It is recommended that the pressure relief valve or TNP be tested once or twice a year to ensure that it will open properly. This video shows you how to test the TNP valve.

Опубликовано:

25 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 28

@Sparky-ww5re Год назад

One tip that I found helpful, is to have a new T&P valve on hand before you test the valve on your water heater as recommended. That way if it continues to drip and can't be stopped you are 100% prepared. And that could be a good thing, because a valve that keeps dripping after testing is likely contaminated with mineral deposits and might fail to pop open in case of dangerous pressure or temperature increase.

@earthangel8730 Год назад

Very easy to understand. I'm going to start testing the valve annually. Thank you.

@Sparky-ww5re 3 года назад

I like watching your videos. About 15 yrs ago in the old farmhouse where i grew up on as a teenager, while we were out of town hauling cattle to the slaughterhouse, T&P valve on our 40 gallon electric water heater, was intermittently discharging extreme hot water that was nearly steam. While also feeling a tingle while touching a hot water faucet in the damp laundry room. Upon investigation, my stepfather who is a Jack of all trades, discovered that a heating element had spilt inside the tank, in such that even though the heater's thermostat was cycling on and off as needed, it only switches one leg, leaving us in a situation where the damaged element was heating constantly with 120 volts, causing the tank to overheat and the valve to release, to protect from an explosion.

@morganinspectionservices3840 2 года назад

That is very interesting. A dangerous situation, for sure. Glad the T&P did its job.

@Yimpa_Joy Год назад

Thank you

@tedlahm5740 3 года назад

Two (2) electric heaters connected in series? Video on that system available?

@loisaustin8908 День назад

My overflow drips continually. Does this valve control that

@morganinspectionservices3840 22 часа назад

I’m not sure what you mean by your overflow. Are you talking about a PVC pipe that goes through an exterior wall near the ground that continues to drip? If that’s what you’re referring to, then yes, it could be your relief valve dripping. Often opening and closing the relief valve two or three times or tapping on it with something such as the handle of a screwdriver can close it and stop the dripping. If not, I do have a video on how to replace the relief valve. It’s a pretty simple procedure.

@hortenciaflores8560 3 года назад

AO Smit brand new. Is normal to whistle wen release water from the pressure valve? Is twice a day.

@morganinspectionservices3840 3 года назад

Are you saying that your relief valve releases pressure twice a day? That is not normal. I have not heard a whistling noise before.

@hortenciaflores8560 3 года назад

My husband just reduse, water pressure And just waiting see if works, It was whistling more often. Thanks.

@Sparky-ww5re 2 года назад

If the valve is leaking intermittently, with small amounts, you have excess pressure, usually from a check valve or pressure reducing valve. The water, when heated, expands, and cannot flow back into the water main. This is thermal expansion. If the valve is intermittently releasing large amounts of extremely hot water, you have excess temperature. You should check for a defective thermostat that is not shutting off the heat source, or a Grounded heating element, if you have an electric water heater. The valve is set to go off at 150 PSI or 210 °F

@fUjiMaNia 2 года назад

@@morganinspectionservices3840 hi does it make a difference if the release valve handle is pointing down or pointing up? it looks both up or down directions are the same and once it's horizontal it releases the pressure then I can I flip it pointing up or down and it shuts off

@augustwest9727 6 месяцев назад

@@fUjiMaNiait does not no.

@grayboywilliams 25 дней назад

How often should water flow through it under normal conditions? Or is it just an emergency system?

@morganinspectionservices3840 24 дня назад

Under normal conditions, water will never flow through the relief valve. Sometimes they will leak and some water will flow through them, but it shouldn’t ever go through the relief valve.

@grayboywilliams 24 дня назад

Thanks. I accidentally leaned on mine today and cracked the cpvc pipe. I reattached it with gorilla glue until I can research what it is and how urgent to repair it.

@chadrowland5234 2 года назад

The T&P valve is the only thing that prevents your water heater from becoming a bomb. Never ever plug a T&P valve. I see this all the time.

@streetsharksbedfordpoint6.933 3 месяца назад

What do u mean by plug?

@angelgama1981 2 года назад

I open my pressure valve to test it it won’t stop leaking now ;(

@streetsharksbedfordpoint6.933 3 месяца назад

What happened? Did u find out?

@augustwest9727 6 месяцев назад

🤔 dont see any expansion tanks on those water heaters... Expansion Tanks are the safety backup for when the T&P valve doesnt work. Its the little bit of extra safety to keep the water heater from becoming a water pressure bomb.

@morganinspectionservices3840 6 месяцев назад

You are correct. Expansion tanks are rare in this part of the country. I’ve done about 8000 home inspections and have probably seen less than 10 expansion tanks in almost 22 years.

@augustwest9727 6 месяцев назад

@@morganinspectionservices3840 in the last year, I've seen 5 water heaters without them... So much for IPC lol

@jeffreyrueckert7576 Месяц назад

@@morganinspectionservices3840 I got one, I'm a mait tech at a correctional facility and saw it save our ass when our reducer failed( water going into the building is over 200psi and it drops it to 65....

@Al-Fiallos 2 года назад

Sorry to tell you this but you are not "testing" the relief valve. All you are doing is "manually" opening it. You cannot properly test a relief valve unless you have a means to isolate the valve and apply pressuer to the base and record the relief pressure with a calibrated gauge. If you are curious, look up the American Petroleum Institute Recommended Practice, after all, you are dealing with a heated pressure vessel.

@morganinspectionservices3840 Год назад

I cannot argue with you that we are not testing the high pressure or high temperature function of the relief valve. We are only testing that the valve will open.

@Al-Fiallos Год назад

@@morganinspectionservices3840 I know I came off sounding pedantic and I apologize to you. I understand that your advice would help to prevent a relief valve from getting stuck from scale build up. Kind regards, Al