HotSpring Spa 1/4" Ozone Check Valve Heaters Four sets of black cover

Four sets of black cover locks

HotSpring Spa Check Valve/Adapter Assembly: Air check valve for all 1993-2001 Hot Spring

Model First SER# Last SER# G

Hot Spot Spa Filter 1993-1997

HotSpring Spa 1/4" Ozone Check Valve Heaters Four sets of black coverHotSpring Spa 1 4" Ozone Check Valve. Freshwater I, II & III 1 4" ozone check valve. Over time the ozonator check valve can begin to breakdown under the harsh conditions of ozone. The check valves have a special diaphragm (Viton) that enables them to last longer than rubber. Rubber diaphragms last about a month before the rubber becomes hard. The purpose of this check valve is to prevent water from draining out of your spa through the ozonator in the