Tankless Water Heater T And P Valve

Tankless heaters are required to have a pressure relief valve.

Tankless water heater t and p valve.

This is just a pressure relief valve i used with a tankless water heater. They are prone to failure particularly if there is any water condition hard water etc at all. 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.

I d check the pressure on the house before you go to the extent of changing the t p valve. Here s an excerpt from that manual. Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not. The valve is called a t p valve or tpr valve for temperature and pressure relief.

So consult the manufacturer s installation manual. 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. The t p relief valve short for temperature pressure relief valve is a critical safety device on your water heater.

In my application code requires a pressure relief but not a temperature relief t p. 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. If all goes well a tpr valve never gets used except during testing.