Tankless Water Heater Pressure Relief Valve Requirements

Bosch noritz etc require a pressure only relief valve on the hot water output.

Tankless water heater pressure relief valve requirements.

The temperature steam rating of a combination temperature and pressure relief valve or valves shall equal or exceed the energy input rating in btu per hour of the water heater. The discharge piping serving a pressure relief valve temperature relief valve or combination thereof shall. T p valve the temperature and pressure relief valve is an important safety device which goes off when your tank exceeds 210 degrees fahrenheit or 150 psi. Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.

Pressure relief only valve to be used when installing tankless water heaters in cpvc or similar piping material. This valve should be connected to a tube that discharges no more than six inches above floor level so hot water won t scald anyone nearby. No shut off valve or other restricting device may be installed between the water heater or storage tank and the combination temperature and pressure relief valve. Pressure temperature relief valve cpc 504 4 504 5 and 608 5 all water heaters have a pressure temperature p t relief valve that is galvanized steel hard drawn copper or cpvc.

What are the code requirements for the discharge piping from a temperature pressure relief tpr valve at a water heater. Tagaki and others i e. Not be directly connected to the drainage system. But if one does it s a big deal.

Serve a single relief device and shall not. Calibrated pressure relief valves are spring operated brass valves designed for use only as protection from the build up of excessive pressure in systems containing water oil or air. Tankless water heater pressure temperature relief valve safety requirements. Thursday march 7 2019 temperature pressure relief tpr valves rarely go off.

Tankless water heater pressure relief valve replacement. Chris the tankless water heater should have been installed only by a qualified tagaki approved installer so it should be proper. The valve shall be drained to the exterior terminate toward the ground maintaining between 6 and 24 of clearance from the ground and point downward. The temperature pressure relief valve lets water escape if the temperature or pressure is too high.

Discharge through an air gap located in the same room as the water heater.