The PureT HOR-05 Big Blue Clear Housing O-Ring is a precision-molded seal designed to maintain leak-free performance in 5-inch Big Blue filter housings. Compatible with AS568-357 standard dimensions, this replacement o-ring ensures proper sealing between sump and cap in residential and commercial whole-house filtration systems.
TECHNICAL DETAILS
O-Ring Specifications
| Model Number | PureT HOR-05 |
| Standard Compatibility | AS568-357 |
| Inner Diameter (ID) | 5-1/2 inches |
| Outer Diameter (OD) | 5-7/8 inches |
| Cross Section (CS) | 3/16 inches |
| Housing Type | Big Blue Clear 10" and 20" Sumps |
| Material | FDA-compliant elastomer for potable water contact |
COMPATIBILITY & APPLICATIONS
Fits Most Big Blue Clear Housings
This o-ring is engineered for standard 5-inch Big Blue clear filter housings from major manufacturers including Pentek, Hydronix, Culligan, and Watts. It provides a reliable seal in whole-house water filtration systems, well water treatment setups, and commercial pre-filtration applications. The AS568-357 dimensional standard ensures cross-compatibility with most domestic and imported Big Blue sump-style housings. Replace o-rings annually or whenever you notice moisture around the housing cap to prevent leaks and maintain system integrity.
💧 Lubricate the o-ring with food-grade silicone grease before installation to extend seal life and make future sump changes easier. A dry o-ring can bind, tear, or create micro-channels that lead to slow leaks over time.
