The Pentair Kit, Piston Shaft Assembly (263055) is the OEM replacement piston shaft assembly kit for Pentair PVC Slide Valves and Push Pull Valves. ⚠️ IMPORTANT: THIS LISTING IS A KIT, NOT A SINGLE PARTPart 263055 is supplied as a complete piston shaft assembly kit. All components within the kit are included in one listing — you do not need to order multiple quantities for a single valve service. The piston shaft assembly is the sliding core of Pentair's PVC slide and push pull valves, controlling water flow through the valve body by traversing a linear path within the valve housing. When the shaft assembly wears, develops cracks, or its sealing surfaces degrade, the valve can lose positive shut-off — allowing flow bypass when the valve is in the closed position or causing operational stiffness when actuating the valve. Replacing the complete piston shaft assembly kit restores full sealing integrity and smooth valve travel. This kit includes the o-rings that are best replaced when servicing the valve. Specifications Pentair Part Number 263055 Part Name Kit, Piston Shaft Assembly Quantity Included Kit Fits Into Brand Equipment Line Model / Part Number Notes Pentair 2 in. Push Pull Valve — Push Pull Series 263064 Slide Valve piston shaft assembly kit Pentair Slide Valve — Slide Valve Series 263052 Slide Valve piston shaft assembly kit Pentair Push Pull Valve — ABS Slide Valves Series 263053 Slide Valve piston shaft assembly kit Pentair Slide Valve — Slide Valve Series 263078 Slide Valve piston shaft assembly kit Pentair Slide Valve — Slide Valve Series 263079 Slide Valve piston shaft assembly kit Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering. Pro Tip Before ordering, locate the model number on the valve body label and cross-reference it against the Fits Into table above. Pentair's Slide Valve and Push Pull Valve lines share similar housings across several model numbers — confirming your valve's model number directly eliminates the risk of ordering for the wrong configuration. While the valve is disassembled for shaft replacement, inspect the valve body O-rings and handle assembly for wear and replace them in the same service visit to avoid a second shutdown.
