Pentair 59052900Z Locking Ring Assembly
The Pentair 59052900Z locking ring assembly is a replacement clamp ring used to secure the lid or upper housing to the tank on compatible Pentair pool filter systems. This component is critical for maintaining a tight seal, proper internal pressure, and safe operation of the filtration system.
Key Details
- Manufacturer: Pentair
- Part Number: 59052900Z
- Product Type: Locking ring / clamp ring assembly
- Function: Secures filter lid or tank top to the lower tank body
Compatible Applications
- Pentair Clean & Clear cartridge filter systems
- Pentair Predator pool filter systems
- Pentair EasyClean D.E. inground filter systems
- Other Pentair filter models that use a similar locking ring design
Function
This locking ring wraps around the perimeter of the filter tank and mechanically clamps the upper and lower sections together. A properly functioning locking ring helps prevent water leaks, air intrusion, and lid separation during system operation.
When to Replace
- Cracks, deformation, or visible wear on the ring
- The ring will not tighten evenly or stay securely locked
- Recurring leaks at the filter lid or tank seam
- After impact damage or prolonged exposure to UV and harsh weather
Installation and Maintenance Tips
- Turn off all power to the pump and fully relieve system pressure before servicing the filter.
- Inspect the tank O-ring and sealing surfaces before installing the new locking ring.
- Ensure the locking ring is evenly seated around the tank before tightening.
- Do not overtighten; tighten only to the manufacturer’s recommended torque or locking position.
- Periodically inspect the locking ring and tank seam during routine maintenance.
Related Products (Aqua Pool Supply)
- Pentair filter tank O-rings
- Pentair filter lids and covers
- Pentair filter hardware and clamps








