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Burnham boiler pressure relief valve is spurting water

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 37 Answers

SOURCE: 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,

Posted on Nov 23, 2008

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co7196
  • 3433 Answers

SOURCE: Gas water heater is discharging out the pressure

The water heater is over heating the water, possibly boiling it and causing steam pressure build up. The thermostat is not sensing the temp to shut off the flame. It would be wise to either have a repairman come out or replace the heater. If pressure builds too high and the relief valve cand keep up ,theer could be a rupure of a water lineSoooooooooooo, turn the gas off and git er done.

Posted on Nov 09, 2009

  • 409 Answers

SOURCE: 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.

Posted on Mar 10, 2010

  • 308 Answers

SOURCE: I have a Vaillant 624e boiler. I keep losing

The expansion tank is located on the header leaving the boiler. If it is a newer style than it will be a cylinder, most likely hanging above the boiler. It will have a valve on the bottom of the tank that looks like a tire or bicycle valve. If you put an air gauge on the valve stem it should read 12 psi, if it reads more, say closer to 30 psi, then the bladder is broke, and it should be replaced. If there is less than 8 psi, then there is probably a slow leak and the tank should be replaced. If it is an older expansion tank, it will most likely be mounted in the ceiling of the boiler room, it will be a large steel cylinder, that is piped into the boiler, and should have a drain valve on on side of it. If this is the case, connect a hose to the valve, and allow all the water to drain from it. This should solve the problem if it is your expansion tank. Hope this helps.

Posted on Apr 03, 2010

garypetterss
  • 15 Answers

SOURCE: pressure relief valve

The pressure relief valve only leaks when there is excess pressure in the system, possible causes could be excessive static pressure, overheating, faulty pressure vessel or undersized pressure vessel.

Posted on Apr 11, 2010

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1 Answer

We have an apartment building with a Burnham 4FW-209-40 LB boiler. It had three raised expansion tanks which fell as supports rusted out. Don't trust the HVAC folks, where do I find out qty an


You have old fashioned tank expansion tanks they probably got waterlogged and thus to heavy for the old rusted bands that where supporting them. they can be replaced with sealed standing or tanks that are supported by your plumbing. these tanks have a bladder that separates the air and water. they can fail in time as well. The old system works well but should have been serviced annually to make sure they where in proper operating condition. not fill of water! they have a valve and a drain to seal them off from the water supply and drain out any water so they could be fully charged. your system needs adequate expansion tanks to keep the pressure from raising to high. that would cause your pressure relief valve to leak. if you do not trust your hvac guys find another. they should know what they are doing and how the system is suposed to work

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Alpha cd28c boiler loosing water and pressure through pr valve when heating is on,and when then switched off needs repressuring to use heating again.no obvious leaks.new pr valve been fitted.pressure


I assume losing pressure through the PR means Pressure Relief Valve (PRV) or temperature pressure (TPR). Open in TPR may mean boiler is overheating/overpressurized. Open in PRV means the Pressure Reducer/Fill Valve in the fill line of the boiler is broken.
House Water Pressure in a home is 30/40 PSI min to 60-80+PSI max.
Boiler PRV/TPR are set at 30 PSI open (SYSTEM PRESSURE) so too high a house water pressure will open the PRV/TPR. Replace the reduction regulator on/in the fill valve assembly

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Ravenheat 80/20 boiler. the boiler looses water pressure but only when working in central heating mode. Boiler holds pressure indefinitely if central heating is not used,hot water can be drawn without a...


Hi, your boilers pressure should be holding 1.5 bar with the relief set about 3. If the pressure is below this the flow switch will cause the boiler to stop as theirs not enough pressure to operate. Another thing, does your boiler have an auto fill system or do you need to plug a hose in to fill it? If its an auto fill system and you lose pressure you could have a leak.

Sep 15, 2013 | Water Heaters

1 Answer

My pressure relief valve on my boiler is allowing water to pass through constantly.how do i adjust it to stop the water flow? only have about 15 pounds of pressure in system


Even a small amount of crud on the rubber washer/sealer can cause the valve to seep. Some valves can be taken apart and cleaned but it will be better to replace the valve. They can be found on line for around $12 or more. You will have to shut off the water in take valve and drain most of the system unless you have a main line shut off valve so the system wont drain back into the boiler. These valves are usually set at 30PSI.

Feb 21, 2011 | Watts Regulator Temperature and Pressure...

1 Answer

My relief valve slowly drips when my boiler runs, fills up a 5 gallon bucket in a day, when it runs alot. this is new ,


Is the pressure in the boiler higher than the set pressure of the relief valve? If it is, there is a problem that the relief valve is trying to correct.
If not, did you try making the valve open?
Be careful, but step back, lift the lever and briefly let the relief valve discharge into a bucket of some sort, maybe you could put some old rags in it to keep from spraying out at you. If there is sediment in the valve this may flush it out.

Dec 06, 2010 | Watts 3/4 Pressure Relief Valve

1 Answer

I have a alpha cd32 boiler,and i keep having to top the water up within the boiler,so to get hot water and heating again.i have checked for water leaks and nothing is found,however i did check the outlet...


Pressure relief valve - replace
The internal seal gets bunged up with dirt & scale and then leaks water [pressure] to that outside pipe
To avoid draining the whole system, turn off the two central heating taps on the 3/4 pipes and then operate the valve manually and / or disconnect - only a small amount of water will escape / drip to below the boiler
Replace valve and fill as before.
If you think your system needs flushing out - now is a good time
Turn off mains electricity to boiler before starting work

Mar 07, 2010 | Watts 3/4 Pressure Relief Valve

1 Answer

Boiler pressure


If there is no leak anywhere in the system [pipes & radiators] Check the emergency pressure relief valve. It usually is at the base of the boiler and drains to outside [15mm pipe] where, if the valve leaks, water drips can be seen.. Looks similar to the picture with your query
Renew the valve
You can take it apart and clean it but I've never found that to be successful in the long term

Dec 29, 2009 | Watts 3/4 Pressure Relief Valve

1 Answer

I have a Glowworm 30 cxi and the light is flashing, the pressure is 0.4.... i have no water or heating...help please


Under the boiler a little right of center there is a blue/other colour knob. Turn this anticlockwise [as you look up] [twist from right to left] This is the mains inlet tap to let water into the boiler and create the pressure shown on the guage 0.5 bar is the absolute nin.
allow the water to flow in until the guage reads about 1 bar then turn off the knob -not too tight as these are plastic
If you allow too much pressure- do not worry, there is an automatic relief valve.
If the boiler persists in loosing pressure, look for a leak in all pipes to & from radiators. If no leak then check the pressure relief valve outlet pipe, it usually goes through the wall to the outside. Look at the end for water drips & if there are drips replace valve

Oct 12, 2009 | Water Heaters

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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