The valve is called a t p valve or tpr valve for temperature and pressure relief.
T p valve tankless water heater.
So consult the manufacturer s installation manual.
Screw the valve into the port on the lower edge of the tankless heater by hand.
The valve s sole purpose is to keep the pressure and temperature inside of a tank below certain levels.
40 gallon water heater keeps leaking from t p valve after using water in house.
Pressure only valves such as cash acme fwl 2 zurn p3000br or watts 174a would be required.
Here s an excerpt from that manual.
I have a tankless heater ever since i bought the house 1 5 years ago the t p valve has been discharging slightly when you turn off a hot water tap.
Tagaki and others i e.
The takagi gas fired tankless water heater manual specifies a pressure relief valve on the hot water outlet.
On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward.
The t and p valve which is located on the.
Changed out t p valve twice then resorted to changing entire water heater.
This valve can be used with all rheem tankless water heater models.
Also known as the temperature and pressure valve this device automatically releases excess pressure in your water heater system.
Brand new water heater started leaking from t read more.
Bosch noritz etc require a pressure only relief valve on the hot water output.
The tankless water heater should have been installed only by a qualified tagaki approved installer so it should be proper.
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.
I was told this is normal.
Gas fired tankless water heaters will usually require a pressure relief valve while electric on demand water heaters may not.
Fit an adjustable wrench onto the flat portion of the valve and continue to tighten the valve clockwise.
They wonder if the missing valve makes the tankless water heaters less efficient or prone to break downs.