Zodiac Jandy 1 1 2" S x 2" Spg 180° Check Valve (7235) dowcorning It also references common cartridge It also references common cartridge cross numbers such as FC 1960 Light duty flow switches like this are useful in control applications where accurate flow verification matters more than heavy switching capacity The Zodiac and Jandy 180 degree check valve is designed for compatible plumbing applications requiring a 1 1 2 inch slip connection on one side and a 2 inch spigot connection on the other This replacement is especially useful where the plumbing layout depends on this specific slip to spigot transition and a straight through 180 degree configuration