Water Coming From Pressure Relief Valve On Boiler

These valves may look identical but they re set to go off at 30 psi.

Water coming from pressure relief valve on boiler.

The pressure relief valve also as known as a blow off valve is a vital component of a boiler. There s a problem with the valve such as a faulty seal and the water is. If a pressure relief valve for a boiler is accidentally installed on a water heater it will leak like crazy from the start. Leaks at temperature pressure relief valves.

Sometimes this coil will develop a pin in it and this causes pressure to seep into the boiler and leads to leaks in the pressure relief valve. The relief valve is working the way it s intended and water drained to reduce the pressure inside the tank. A common sight in a hydronic boiler room is water dripping from the discharge pipe of the boiler relief valve. The feed valve regulates water pressure into the system.

The valve s relief of elevated liquid gas or steam pressures prevents damage to the system. While it may appear to be inconsequential it could cause extensive damage to the heating system. With no viable expansion tank the system pressure rises and the relief valve pops. Some boiler rooms have a bucket under the relief valve discharge pipe to mask the problem.

If the pressure rises whether the boiler temp is rising or not then you may have a faulty feed valve. Without a properly working valve dangerous levels of temperature and or pressure may build up in a home s heating system. Relief valves are designed to open at a preset pressure or temperature level and relieve the system when it has exceeded the desired level. The following are some suggestions if you would like to resolve the problem.

To identify if you have an over pressure fault look at the gauge needle on your boiler it should be pointing in the green section set to around one bar. If it s in the red that indicates over pressure. The valves fill up with crap. If it is the pressure release valve then it s there in case the water in the boiler goes over pressure it will open and release water.

Some boilers have a tankless water heater or what is also known as a hot water coil. The boiler pressure relief valve is designed to leak water as a safety protection feature to prevent damaging your appliances. So if the thing is leaking then it is unlikely that you are going to have a problem with the boiler running out of water because there is obviously water in the system. We list the wide variety of possible tp valve leaks and how to find and fix each of those.

Turn off the water to the coil and check if the pressure stops rising. When you see water coming out from the water heater release valve there are two most likely causes. When the water in the system heats up it expands. Extreme pressure within the system could cause the boiler or water lines to rupture.