The MTM PF22 Foam Cannon Repair Kit replaces sealing rings, the pin, and the filter on a used and tired foam cannon in need of a good kick in the ass. These are not bags of knock-off parts that will work good enough, but the same factory parts used during initial assembly of the PF22.
Use this video as a reference when tackling the process:
Collections: fittings, foam cannons, MTM Hydro