Pentair R172224X Drain and Vent Valve - Black This is an O-Ring used

This is an O-Ring used on the Pentair/Purex SM & SMBW 4000 D

VS 3050 and SVRS inground pool and spa pumps

Measures 1-1/2-inch by 2-inch

5" SLIP X SLIP Valve

Pentair R172224X Drain and Vent Valve - Black This is an O-Ring usedPentair R172224X Drain and Vent Valve Black This drain and vent valve is designed to use with Pentair Dynamic series I, II RTL RCF and III RTL RCF inline pool spa cartridge filter models RDC 25, RDC 25S, RDC 50, RDC 50S and also compatible with Pentair Rainbow high capacity automatic chlorine bromine pool and spa feeder models HC 3315, HC 3330, HC 3340. Also fits Pentair Predator II mini cellular media pool spa cartridge filters and Dynamic RCF RTL