Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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500-1600 | Waterway Slide Valve Piston Shaft
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Waterway 500-1600 Piston Shaft Assembly is a precision-engineered internal replacement component designed for the 2½″ slide-valve assemblies in the Waterway Hi-Temp PVC “Crystal Water” filter line. It restores proper sliding action, ensures tight sealing and maintains reliable flow direction in the valve when worn or damaged. This piston shaft kit includes the core shaft plus the associated O-rings, gaskets and seals necessary for a complete refresh of the valve mechanism. With this assembly installed, you can avoid full valve replacement and extend the life of your filter system.
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Complete Internal Assembly: Includes the piston shaft plus all necessary seals and gaskets (e.g., 505-1021, 505-1041, 505-1031, 820-1050) for one seamless installation.
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Restore Valve Functionality: Designed specifically for the 2½″ slide-valve (Crystal Water / Hi-Temp series) to restore smooth travel and proper alignment.
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Durable Construction: Made by Waterway Plastics with quality materials to withstand spa/pool chemicals, back-wash action and repeated cycles.
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Cost-Effective Alternative: Rather than replacing the full valve body, installing this internal assembly gives many more years of reliable service.
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Compact & Easy Install: One-piece kit simplifies maintenance and helps minimize downtime of your filtration system.
- Waterway Crystal Water D.E. Filters