Watts 0888910|WW0888910 - RK 775/775DCDA-RT 3-4

This 3-4 IN rubber parts replacement kit for series 775 and 775DCDA prevents the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. It consists of a first and second check assembly O-ring and first and second check disc. It is designed for installation on applications identified by local authorities as non-health hazard, such as on fire protection systems.