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.

In my application code requires a pressure relief but not a temperature relief t p. Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not. On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward. The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet.

So consult the manufacturer s installation 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. This valve may sit quietly unnoticed on your water heater but it has a very important purpose.

You shouldn t need an expansion tank on a tankless water heater. This is just a pressure relief valve i used with a tankless water heater. Tankless heaters are required to have a pressure relief valve. If all goes well a tpr valve never gets used except during testing.

The t p relief valve short for temperature pressure relief valve is a critical safety device on your water heater. This is one of those things that should never be needed unless something goes very very wrong with the tankless water heater. Here s an excerpt from that manual.