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My Crown Boiler leaking water from escape valve when its on

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Hi,
The probelm if either a bad fill valve or a bad expansion tank. Either one of those things will make your boiler leak through the relief valve.
Tap on the expansion tank and see if it is totally full of water. If it is then that is your problem, if there is air in it and it sounds hollow then the fill valve is the problem.
This tip I wrote pertains to your problem although not exactly the same... it may help you.

http://www.fixya.com/support/r3584200-boiler_leaking_water__the_boiler_leak_ma

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

Posted on Dec 11, 2009

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

Hi there,
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Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

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Posted on Jan 02, 2017

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1 Answer

Gas boiler leaking


The video zeroed in on a relief valve. They love to leak once opened. If it won't re-seal after you lift the little handle and let out some water, you will have to replace it.

Dec 01, 2013 | Water Heaters

Tip

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

Tip

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

1 Answer

I very stupidly turned a (sort of) valve marked "closed" at the bottom of my boiler (vaillaint turbotec pro) which was followed by a great escape of water. Now I can't get the water to stop and naturally...


You discovered how to drain the boiler. The boiler should be flushed periodically to remove sediment, although preferably on a schedule of your choosing. It may be necessary to replace the valve get things back to normal.

Feb 22, 2018 | Heating & Cooling

1 Answer

Loss of pressure in boiler, no obvious leaks, water pressure switch changed plus pressure release valve


Check that your make up water is on.

Make sure your fill valve is working but it sounds like it is not. Your min pressure should be 15 psig. on the boiler. Fill valve will maintain a15 psig on the boiler. Water and pressure does get out of the boiler when radiators are bleed. When fill valve is not working people will keep bleeding the radiators trying to get heat but only lowering the boiler pressure with no water make up.

Make sure your boiler is getting water and has pressure when running.

If it isn't...SHUT DOWN and have a professional look at it.

Pressure relief valve is factory set ta 30 psig and opens when pressure is above 30 psig. This is a safety valve.

Feb 17, 2011 | Heating & Cooling

1 Answer

When pulling coffee by opening valve, water leaks from spindle. Safety valve is leaking?


in the system you have 2 safety valves. one for tank other for coffee boiler. the coffee boiler safety valve should be set at 12 bar. if safety valve of boiler is leaking try resetting or changing rubber than setting.
ps: do not touch the tank safety valve, only change it with new, tested and sealed one.

Feb 09, 2011 | La Pavoni CUA001R Cuadra Espresso Machine

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 Baxi Combi boiler and want to add new TRVs to the radiators. Do I need to drain the system or can just turn off all the radiators and hope not much water escapes. How do I add new inhibitor...


You will need to isolate the boiler from the radiators because there is an auto feed valve that will continue to allow water into the system if the pressure in the boiler drops. There should be some valves off of the boiler that will allow you to do this.

Nov 07, 2008 | Heating & Cooling

1 Answer

I have a ideal mini c24 cobi boiler and it isnt holding pressure the are no leaks inside the house it just seems to be releasing the water for the central heating from the blow off pipe outside so i keep...


So the boiler relief valve is leaking? What is the boiler pressure when the relief valve leaks? The relief valve will have a pressure rating on it. If the relief valve leaks when the pressure in the boiler is lower than the relief valve setting then its just a bad relief valve. If the relief valve is leaking when the boiler pressure gets above the relief valve pressure setting then the relief valve is doing its job and there is another problem. Several things can cause the boilers pressure to go higher than the relief valves setting. It could be a bad expansion tank or one that needs to be drained and re-charged. It could be a bad cold water fill valve that isn't shutting off and is over filling the system, rasing the pressure above the relief valve setting. If this boiler also does your domestic hot water, I have seen where the domestic hot waters heat exchanger has a hole in it and the domestic hot water is mixing with the boilers water and over pressuring the boiler.

Jan 13, 2018 | Heating & Cooling

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