Waterway Pro Clean Plus Lock Ring | 550-0701

The Waterway 550-0701 is a genuine OEM lock ring assembly designed for the Waterway Pro Clean Plus cartridge filter series. The lock ring is the mechanism that secures the filter tank lid to the base under operating water pressure, creating a watertight seal that keeps the system pressurized and functioning properly during the filtration cycle. A cracked, warped, or broken lock ring is one of the most common causes of filter lid leaks and pressure loss on the Pro Clean Plus series. Important: the 550-0701 is the new-style lock ring compatible only with Pro Clean Plus filter bases manufactured 2015 and newer — a separate lock ring is available for pre-2015 bases. Also cross-referenced as Leslie's/Jacuzzi part number 370245.

Highlights

• Genuine Waterway OEM Lock Ring Assembly: Factory-authorized 550-0701 lock ring manufactured by Waterway Plastics to exact OEM specifications, ensuring a precise, secure fit on all compatible Pro Clean Plus cartridge filter bases manufactured from 2015 to present.
• 2015 & Newer Base Compatibility — Verify Before Purchasing: The 550-0701 is the new-style lock ring and fits only Pro Clean Plus filter bases manufactured 2015 and newer. A separate lock ring is available for pre-2015 bases — always confirm your filter's manufacturing date before ordering to ensure the correct fitment.
• Restores Watertight Pressure Seal: The lock ring clamps the filter lid securely to the tank body under operating pressure — a damaged or worn ring is a leading cause of lid leaks, pressure loss, and reduced filtration performance on the Pro Clean Plus series.
• Integrated Yellow Latch Design: The lock ring assembly features integrated yellow latches that are not sold separately, making the 550-0701 the complete replacement unit needed to fully restore the lid-to-base locking and sealing system on compatible filter models.
• Cross-Referenced as Leslie's/Jacuzzi Part 370245: Verified compatible and listed as a direct cross-reference for Leslie's and Jacuzzi part number 370245, making it easy to confirm fitment across multiple parts sourcing platforms and service references.