Watts RK-800M3 Vent Float 1/2 in. – 3/4 in.

This 1/2-3/4 IN float repair kit for a pressure vacuum breaker series 800M3 prevents the reverse flow of polluted water from entering into the potable water supply due to back siphonage. This kit consists of a float vent disc assembly (vent float, seal and spring) and bonnet O-ring.