Raypak 007224F Pressure Relief Valve Kit, 125 PSI, for 266/266A, 336A and 399/406A Pool Heaters

The relief valve mounts in the 3/4 inch NPT relief valve port in the heater header and opens to release water if pressure in the heater rises to its setting. Listed for heaters built from October 2004.

Not for the 206A: Raypak lists a different 125 PSI valve, 008091F, for that size.

Good to know: Raypak's manual for these heaters says the relief valve is installed in a vertical position and, in the polymer header, hand tight plus half a turn without over-tightening. Run a drain pipe the same size as the valve outlet, pitched downward, to a safe place of discharge, with no shutoff valve between the relief valve and the drain line. Raypak says to trip the valve lever at least once a year.

Raypak's ASME 206A to 406A heaters are listed with a 100 PSIG maximum working pressure and a 75 PSI relief valve; this 125 PSI valve is an option in the parts list. The relief setting has to suit the heater's rating plate and local code.