Tankless Water Heater T And P Valve

Here s an excerpt from that manual.

Tankless water heater t and p 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. The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet.

The t p relief valve short for temperature pressure relief valve is a critical safety device on your water heater. This valve may sit quietly unnoticed on your water heater but it has a very important purpose. This is one of those things that should never be needed unless something goes very very wrong with the tankless water heater. In my application code requires a pressure relief but not a temperature relief t p.

If all goes well a tpr valve never gets used except during testing. I m betting the pressure is a little high and the act of water hammer is pushing the valve open a little. Tankless heaters are required to have a pressure relief valve. This is just a pressure relief valve i used with 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. I d check the pressure on the house before you go to the extent of changing the t p valve. To keep your heater from exploding.