T P Valve Tankless Water Heater

I was told this is normal.

T p valve tankless water heater. Now the t p valve is leaking constant when you use hot water. The tankless water heater should have been installed only by a qualified tagaki approved installer so it should be proper. We are here to tell you that it is okay for some water heaters to be without temperature pressure relief valves. Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not.

Changed out t p valve twice then resorted to changing entire water heater. Fit an adjustable wrench onto the flat portion of the valve and continue to tighten the valve clockwise. Screw the valve into the port on the lower edge of the tankless heater by hand. They wonder if the missing valve makes the tankless water heaters less efficient or prone to break downs.

Tagaki and others i e. The valve is called a t p valve or tpr valve for temperature and pressure relief. The t and p valve which is located on the. This valve can be used with all rheem tankless water heater models.

Here s an excerpt from that manual. The valve s sole purpose is to keep the pressure and temperature inside of a tank below certain levels. Brand new water heater started leaking from t read more. The ap12993c is the equivalent version with the watts 3 4 inch pressure relief valve model 3l 150.

If all goes well a tpr valve never gets used except during testing. The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet. Pressure only valves such as cash acme fwl 2 zurn p3000br or watts 174a would be required. So consult the manufacturer s installation manual.

Bosch noritz etc require a pressure only relief valve on the hot water output. 40 gallon water heater keeps leaking from t p valve after using water in house. Also known as the temperature and pressure valve this device automatically releases excess pressure in your water heater system.