Tankless Water Heater T And P Valve

Here s an excerpt from that manual.

Tankless water heater t and p valve.

They are prone to failure particularly if there is any water condition hard water etc at all. The valve is called a t p valve or tpr valve for temperature and pressure relief. The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet. This valve may sit quietly unnoticed on your water heater but it has a very important purpose.

I m betting the pressure is a little high and the act of water hammer is pushing the valve open a little. You shouldn t need an expansion tank on a tankless water heater. Tankless heaters are required to have a pressure relief valve. The t p relief valve short for temperature pressure relief valve is a critical safety device on your water heater.

This is just a pressure relief valve i used with a tankless water heater. If all goes well a tpr valve never gets used except during testing. To keep your heater from exploding. 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.

On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward. So consult the manufacturer s installation manual. Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not.