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Keep having the relief valve leak. Have replaced the pressure reducing valve 3 times. Reducing valve keeps going bad. Is there a special pressure reducing valve that you recommend. Or do you have a part #.

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Valve Pressure Reducing or Pressure Reducing Valve


dfef4ee.jpgThe pressure reducing valve on a boiler is the way that the water pressure in the boiler is controlled. The standard pressure for many hot water boilers is considered to be 12 PSI. To keep the boiler pressure at or near the 12 PSI mark a small valve is used for pressure reducing. Most domestic water systems run between 20 and 60 PSI, so the pressure must be reduced for the boiler.

This pressure reducing valve is installed in the pipe that goes from the domestic cold water to somewhere in the piping on the heating system, usually at or near the expansion tank. The valve is mostly maintenance free but will create some problems at times. Some of the things that can go wrong are:

  1. The valve seat can get dirt stuck under it causing water to leak by and increase the pressure in the boiler, causing the relief valve to release water periodically.
  2. The valve can become plugged with dirt causing the boiler to not have enough water pressure, which will cause circulation problems with the boiler pumps.
  3. The valve can leak causing a mess around the boiler area.

Replacement of the pressure reducing valve is not difficult if the installer strategically placed manual valves so that the reducing valve can be isolated from the rest of the system for replacement.
If the water pressure reducing valve fails in any way, it is usually best to just replace the whole valve rather than trying to repair or fix it. I have tried a number of times with only temporary results. These valves are not a high dollar item and the time it takes to fix them is not worth it.

http://www.fixya.com/support/r3696173-expansion_water_tank_boiler_expansion

http://www.fixya.com/support/r3705970-heating_circulating_water_pump_problems

on Dec 23, 2009 | Heating & Cooling

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Boiler Leaking Water - The Boiler Leak may not be the boiler


Went on one call today and had another query by Facebook about this so I though why not write an article about it. Both persons were very concerned as they saw water dripping from theirs boilers. A closer inspection for both showed that it had nothing to do with the boiler its self.

There are many things that can make water leak from your boiler. If you know for sure that the water is coming from a hole in the sections then you may have a serious problem. Usually though there is an easy fix for that also, more on that in another article. Both boilers today were leaking water from the relief valve.254c728.jpg

This valve is design to relieve the excess pressure from the boiler in case of a build up of extra pressure in the boiler. The extra pressure can come from a number of different things. A few of the causes may be a bad expansion tank, a bad fill valve or pressure reducing valve, or an open bypass valve. The bypass is easy, just close it and relieve the extra pressure. The others are not as easy.

Your expansion tank is simply a tank that allows water from the system to go in and out according to the pressure in the system.610ab3c.jpg This tank contains about ½ air which acts as a cushion to absorb the extra volume of water that is created as the water is heated. Hotter water takes up more space or volume, so it needs a place to go to when it is heated. If the expansion tank is totally full of water then, it will push water out of the relief valve. Changing your expansion tank will fix the problem.

If the reducing valve or fill valve is leaking by then you can also get extra pressure in the system.8e5ccb4.jpg A normal heating system will only run 10-20 psi pressure. Most well systems or city water is way higher than that. If the pressure in your boiler gets over 30 psi then it will begin to relieve the extra pressure by dripping water.

If you have a drip from your boiler this is what you check. First the expansion tank, the reducing valve, and the bypass valve that bypasses the fill valve. This valve is usually installed to quick fill the system, or purge the water lines of air.

Often there is just a small problem that looks like a big problem. Do not get excited and methodically check through the possibilities. You will usually find that the problem is not nearly as bad as you first thought that it was.

on Dec 06, 2009 | Heating & Cooling

4 Answers

My water heater has a leak only when it is turned on.


it could be a leak around an element if it is an electric heater.

Jun 04, 2014 | Suburban Direct Spark and Electric Water...

1 Answer

Compressor runs fills tank but then it wont keep the pressure, won't restart to keep pressure above requested pressure. I have to let it seat for 1/2 hour to restart again


Most likely problem is the tank fill check valve. The most common way a a tank will loose pressure is by leak-back at the check valve. This also makes it hard to start because it leaves the tank pressure on the pump head instead of letting it bleed off. The motor will only restart after the tank pressure is bleed off to a low level, reducing the back pressure the motor will have to overcome. Leaking can be heard at the pressure switch, where the air is normally bleeds off over 10 seconds or so after the motor turns off. A defective check valve will continuously leak down at the pressure switch unloader valve instead of bleeding out in just 10 seconds. The check valve is an assembly that is largely hidden inside the tank. It just looks like a large hex nut where the filler tube from the pump enters the tank. Removal usually means first removing a smaller hex/barb/connector where the smaller relief line ties into the big nut. Inspection of the check valve will easily reveal whether this is the problem.

Oct 20, 2012 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

My pressure valve keeps popping open. I have replaced both elements & stats, and now on the 2nd pressure relief valve..what else could be wrong?


1) Buy pressure gauge.
Put gauge on drain valve.
Anything over 80psi will damage tank.
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html#pressure
If drain valve is clogged:
http://waterheatertimer.org/Water-heater-will-not-drain.html

geno_3245_247.jpg

2) Buy pressure reducing valve
http://www.amazon.com/Watts-0007752-Water-Pressure-Reducing/dp/B002PWPPZ6

3) Turn down temperature on thermostats

4) Add expansion tank on incoming cold water line.
Has to be on cold water line.
Buy at Home Depot or plumbing supply.
About the size of small football.
geno_3245_248.jpg

5) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 15, 2011 | Reliance & 50gal Electric Water Heater

2 Answers

I replaced the pressure relief valve but still leaking


Might need to install/ replace the pressure reducing valve between the house and water supply.

Mar 13, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

Boiler relieve valve always releave water .I put gage and gage shows me that preassure is more then 30 at time of valve releave it.But rest of the time it is 18-19 psi.Something is not working in this...


Hello, the water feed valve. also called the pressure reducing valve is leaking by...this slowly adds water to your system. You need to repace that and then also the relief valve.

This tip will help also...

http://www.fixya.com/support/r3695967-valve_pressure_reducing_or_pressure

Heatman101

Mar 03, 2010 | Garden

1 Answer

Leaking pressure relief valve


what is the water pressure on the cold side? You may need to install a pressure reducing valve at the water heater inlet to reduce inlet pressure and keep pop off valve from opening when not needed.

Feb 27, 2010 | Emerson Part UWL Chrome Ultrasystem water...

1 Answer

Boiler leak


Hi, it appears you have a defected relief valve. you can try one solution. lift the handle on the relief valve and let some water out. sometimes that can flush out materials thats blocking the stem in the valve. if it's still leaking it must be replace.

If this doesn’t work for you please write back. Thanks,

Nov 23, 2008 | Watts 3/4 Pressure Relief Valve

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