500-1600 | Waterway Slide Valve Piston Shaft

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.

Highlights

• 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.

• Restore Valve Functionality: Designed specifically for the 2½″ slide-valve (Crystal Water / Hi-Temp series) to restore smooth travel and proper alignment.

• Durable Construction: Made by Waterway Plastics with quality materials to withstand spa/pool chemicals, back-wash action and repeated cycles.

• Cost-Effective Alternative: Rather than replacing the full valve body, installing this internal assembly gives many more years of reliable service.

• Compact & Easy Install: One-piece kit simplifies maintenance and helps minimize downtime of your filtration system.

Compatibility

• Waterway Crystal Water D.E. Filters

Additional Info

This FAQ helps in-store customers verify valve compatibility, seal configuration, and installation steps before picking up the Waterway 500-1600 Piston Shaft Assembly from Discount Pool Mart. It also explains what to bring for fast counter confirmation.

Valve Compatibility, Fitment & Series Identification

These answers help walk-in shoppers ensure the kit matches their Waterway slide-valve assembly.

How do I confirm the 500-1600 fits my slide valve?

Check your valve body for Waterway Hi-Temp or Crystal Water markings and confirm it uses the 2½ inch slide-valve layout. If the internal piston shaft is similar in length and design, this assembly is typically the correct match.

Will this kit work if my valve only leaks in certain positions?

Yes. Worn piston seals often leak when the shaft is misaligned or the seals have flattened. Replacing the internal assembly restores proper seating and travel.

Can I bring the old piston shaft to Discount Pool Mart?

Yes. Bringing your old part—or photos of the valve body—allows store staff to confirm the correct assembly before purchase.

Seal Behavior, Valve Travel & Expected Performance

These details help customers understand how the valve will operate once rebuilt.

What parts are included with the 500-1600 assembly?

It includes the piston shaft and the associated sealing components needed to rebuild the interior of the 2½ inch slide valve.

Will this reduce stiffness or binding when operating the valve?

Yes. New seals and a clean piston surface restore smooth sliding action and consistent alignment inside the valve chamber.

Does the rebuild help prevent water bypass?

In most cases, yes. Fresh seals create more even pressure, reducing bypass and improving flow direction control.

In-Store Pickup, Inspection & Prep for Rebuild

Helpful guidance for Discount Pool Mart customers preparing for service work.

What should I bring to the store for best results?

Bring photos of your valve markings, plumbing orientation, and the old piston shaft to ensure correct fitment when picking up in store.

Can I compare the new assembly with my old one?

Yes. Customers can inspect the kit at the counter to confirm the seals, shaft length and end profile match their original.

Is the kit ready for installation right away?

Yes. Once the valve body is cleaned and the old components removed, the new piston shaft assembly is ready to install immediately.