Fits 2-1/2 inch 909RPDA and 3 inch 909RPDA

This first check repair kit is used for replacing or repairing the first check on a reduced pressure backflow assembly used to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. This kit consists of the disc and spring assembly, cover O-ring and lubricant.