Home

#2-228 Collar and Rotor Union O-Ring 071426Z

Keep your pool’s filtration system running at peak efficiency with this professional-grade #2-228 union O-ring. Designed to provide a vacuum-tight seal for the collar and rotor assemblies of various cartridge and D.E. filters, this EPDM rubber seal prevents both air and water leaks at critical plumbing junctions. Built for durability and chemical resistance, it is a direct replacement part for systems including the 2000 Series, Mini-Cellular Media, and high-capacity cartridge housings. Whether you are performing a seasonal filter deep-clean or fixing a pressure-side drip, this precision-molded O-ring is essential for maintaining a safe and stable equipment pad.

Specifications

Replacement #2-228 Union O-Ring

Professional-grade EPDM rubber seal designed to provide a vacuum-tight connection for cartridge and D.E. pool filters. Essential for maintaining the airtight integrity of collar and rotor assemblies, preventing leaks at critical high-pressure plumbing junctions.

Industry Size #2-228

UPC Code 788379911515

Material High-Grade EPDM Rubber

Inside Diameter ~2.23"

Cross Section ~0.14"

D.E. Fit 2000 Series (SM/SMBW)

Cartridge Fit 50-200 Sq. Ft. Series

Resistances UV, Ozone, Chlorine

Safety Warnings & Critical Care

No Petroleum Lubricants: NEVER use Vaseline or petroleum jelly. These cause EPDM rubber to swell and disintegrate, leading to catastrophic system leaks.

Depressurize Tank: NEVER loosen a union nut while the pump is running. Turn off power and bleed all air via the relief valve until the gauge reads zero before service.

Hand-Tight Only: Do not use wrenches to fix a leaking union. This typically indicates the O-ring is seated incorrectly, dirty, or the wrong size.

💡 Pro-Tips for a Perfect Seal

The Lube Requirement: Apply a thin coat of silicone-based lubricant before installation. This prevents "rolling" or "binding" when tightening the union nut.
Clean Mating Surfaces: Use a clean cloth to wipe the union groove and bulkhead face. A single grain of sand can cause high-pressure seal failure.
Visual Inspection: Stretch the O-ring slightly before installing to check for tiny cracks. Discard immediately if any "checking" is visible.
Application: Specifically designed for the connection between the filter bulkhead and the union tailpiece/rotor assembly.