Tankless Water Heater T And P Valve

I m betting the pressure is a little high and the act of water hammer is pushing the valve open a little.

Tankless water heater t and p valve.

This valve may sit quietly unnoticed on your water heater but it has a very important purpose. In my application code requires a pressure relief but not a temperature relief t p. Here s an excerpt from that manual. I d check the pressure on the house before you go to the extent of changing the t p valve.

The valve is called a t p valve or tpr valve for temperature and pressure relief. To keep your heater from exploding. Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not. Tankless heaters are required to have a pressure relief valve.

My personal opinion of tankless heaters is that they are way too expensive to install and maintain never mind that few plumbers know how to service them. So consult the manufacturer s installation manual. You shouldn t need an expansion tank on a tankless water heater. On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward.

This is one of those things that should never be needed unless something goes very very wrong with the tankless water heater. This is just a pressure relief valve i used with a tankless water heater. The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet.