Waterway Slide Valve Piston Shaft | 500-1600The Waterway 500 1600 Piston Shaft Assembly is designed to restore the internal function of Waterway Crystal Water and Hi Temp slide valve systems built around the 2 inch valve design. Produced to original Waterway engineering specifications, it refreshes the piston mechanism responsible for smooth sliding travel, tight sealing, and dependable flow direction inside the valve. The kit includes the central piston shaft along with the required O rings,