The PureT HOR-02 Big Blue Housing O-Ring is a precision-molded 357 Buna-N seal designed to maintain leak-free operation in 10" and 20" Big Blue filter housings. This direct replacement for Pentek 151122 features 70A durometer Buna-N construction with 5-1/2" ID and 5-3/4" OD dimensions for reliable sealing in standard Big Blue sump applications.
TECHNICAL DETAILS
O-Ring Specifications
| Model Number | PureT HOR-02 |
| Material | Buna-N (Nitrile Rubber) |
| Hardness | 70A Durometer |
| Cross Section | 3/16" |
| Inside Diameter | 5-1/2" |
| Outside Diameter | 5-3/4" |
| O-Ring Size | 357 |
COMPATIBILITY & APPLICATIONS
Compatible Housing Models
Engineered for PureT 907 and 908 series Big Blue filter housings. Direct replacement for Pentek 151122 o-rings used in most standard 10" and 20" Big Blue housings from major manufacturers. The 70A Buna-N formulation provides excellent chemical resistance and compression set properties for municipal water filtration applications with temperatures up to 180°F. This 357 size o-ring is the industry standard seal for Big Blue sump-to-cap connections in residential and light commercial installations.
💧 Replace your Big Blue housing o-ring every 2-3 filter changes or annually to prevent leaks. Keep the o-ring groove clean and apply a thin layer of silicone grease during installation for optimal seal life.
