Question about Watts 3/4 Pressure Relief Valve

1 Answer

Boiler leak I replaced the pressure relief valve recently when I serviced my UTICA boiler. All appears to be well except I keep losing water thRough the valve. I don't see the pressure rising above 30psi. Can you help?

Posted by on

  • 1 more comment 
  • VONVOV5051 Dec 08, 2008

    I DO NOT THINK THE PROBLEM IS THE VALVE, AS FOR SOME REASON THE BOILER PRESSURE IS GOING OVER /OR REACHING 30PSI AND TRIPPING OUT THE VALVE ( A 30 PSI).
    I HAVE CHECKED THE FUNCTION OF THE EXPANSION TANK AND IT APPEARS TO WORKING PROPERLY.I NEED MORE INFO. IS THERE TOO MUCH WATER IN THE SYSTEM? DO I HAVE AIR IN THE PIPES?

  • averano Dec 29, 2008

    Liberty Boiler, when the system calls for heat and the circulator runs, the pressure of the boiler reaches right at 30 lbs and the watts 174, 30 LB relief valve starts to leak water about a cup per heat call. Water temp at 180.I have replaced the expansion tank with a slightly larger one and replaced the relief valve twice. I tried bleeding air. When it heats water with the internal coil it is fine and pressure never exceeds 15 lbs. Can I go to a slightly higher relief valve 35 lbs or so?? Any ideas??

  • Allen Neal
    Allen Neal May 11, 2010

    DOES BOILER HAVE A EXPANSION TANK IN SYSTEM

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 37 Answers

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

  • AL Turcotte Nov 27, 2008

    Hi, make sure the relief valve handle is in the down position.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

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

Oct 20, 2014 | Water Heaters

1 Answer

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

I have a Vaillant 624e boiler. I keep losing pressure. Then sometimes it shoots up to maximum. The pressure relief valve is also dripping sometimes. I am told it may be the expansion tank. Where is this...


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.

Apr 03, 2010 | Water Heaters

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

2 Answers

Vokera linea 28 boiler. I am continuously having to re-pressurise the loop (about twice weekly) also i keep getting a code 3 error appear which i know is a fan flue problem i have reset the boiler. The...


I have a similar problem with this boiler. When CH on, boiler overpressurises, (check relief valve outlet) You will then lose water from the CH loop and will have to repressurise when the CH loop cools. The problem is most likely caused by a loss of air from the expansion tank, which will need re-charged. This is not a big job as it has a standard tyre type valve connection but needs an accurate pressure gauge. Probably best left for plumber.

Mar 12, 2009 | Water Heaters

1 Answer

Boiler keeps losing pressure when the heatings off


Hi Leehardcast,

Yes the problems are related. The system is low on water. So now instead of water you have air in radiators which is easily compressed when it heats up. Then pressure loss when it cools down.

Add some water to your system until you have 15lb pressure and bleed out upstairs radiators at the same time.

Please rate this response and Good luck, Phil

Jan 13, 2009 | Watts 3/4 Pressure Relief Valve

Not finding what you are looking for?
Watts 3/4 Pressure Relief Valve Logo

Related Topics:

732 people viewed this question

Ask a Question

Usually answered in minutes!

Top Watts Water Heaters Experts

Donni Steen

Level 3 Expert

659 Answers

Brad Brown

Level 3 Expert

15111 Answers

Gil Shultz

Level 3 Expert

3368 Answers

Are you a Watts Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...