Big Blue Filter Housing O-Ring – Fits 4.5″ x 10″ & 4.5″ x 20″

This replacement O-ring is designed to create a secure, watertight seal for filter housings that use 4.5″ diameter filter cartridges in either 10″ or 20″ housing lengths. A properly fitted O-ring is critical for preventing leaks and maintaining proper system pressure.

Made from durable rubber material, this O-ring seals between the housing cap and sump during filter changes and routine maintenance. Replacement is recommended if the O-ring shows signs of wear, flattening, cracking, or if leaking is present.

Compatible with Big Blue style filter housings that accept 4.5″ x 10″ and 4.5″ x 20″ filter cartridges.

Specifications
Compatible Filter Sizes: 4.5″ x 10″ and 4.5″ x 20″
Application: Filter housing seal
Material: Rubber
Use: Replacement O-ring for housing maintenance
Helps prevent leaks and maintain proper housing seal