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Pentek (151122) Replacement O-Ring for #10 or #20 Big Blue Filter Housing

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Pentek (151122) Replacement O-Ring for #10 or #20 Big Blue Filter Housing

The Pentek 151122 O-Ring is an FDA-grade Buna-N replacement seal engineered for Big Blue and Heavy-Duty filter housings across major brands. This 5.5-inch inner diameter ring ensures a leak-proof seal when properly lubricated and installed according to manufacturer guidelines.
SPECIFICATIONS

Pentek 151122 O-Ring Technical Details

Model Number Pentek 151122
Material FDA-Grade Buna-N (Nitrile Rubber)
Inner Diameter (ID) 5.5 inches
Outer Diameter (OD) 5.75 inches
Housing Compatibility #10 and #20 Big Blue Filter Housings
Replaces W10-OR, OR-100 Culligan O-Rings
Not Compatible With Pentek Big Clear Housings
INSTALLATION & USE

How to Replace Your Filter Housing O-Ring

  1. Turn off water supply and depressurize the housing by opening the pressure relief button or valve
  2. Remove the old O-ring and clean the groove thoroughly with a damp cloth to remove any debris or residue
  3. Apply a thin coat of food-grade silicone lubricant to the new Pentek 151122 O-ring
  4. Seat the O-ring evenly in the housing groove, ensuring it sits flat without twists or folds
  5. Hand-tighten the housing sump and gradually restore water pressure while checking for leaks
COMPATIBILITY

Compatible Filter Housing Brands

The Pentek 151122 O-Ring fits Big Blue and Heavy-Duty #10 and #20 filter housings from Pentek, Culligan, Ametek, US Filter, Plymouth Products, Kleen Plus, and American Plumber. This cross-brand compatibility makes it a reliable replacement seal for most standard 10-inch and 20-inch Big Blue housings. Note that this O-ring is not designed for Pentek Big Clear housings, which require a different seal dimension.

🔧 Pro Tip: Inspect your O-ring every time you change the filter cartridge. Even small cracks or stretching can cause slow leaks that waste water and reduce system pressure. Keep a spare Pentek 151122 on hand so you're never caught without a replacement during routine maintenance.
The Pentek 151122 O-Ring is an FDA-grade Buna-N replacement seal engineered for Big Blue and Heavy-Duty filter housings across major brands. This 5.5-inch inner diameter ring ensures a leak-proof seal when properly lubricated and installed according to manufacturer guidelines.
SPECIFICATIONS

Pentek 151122 O-Ring Technical Details

Model Number Pentek 151122
Material FDA-Grade Buna-N (Nitrile Rubber)
Inner Diameter (ID) 5.5 inches
Outer Diameter (OD) 5.75 inches
Housing Compatibility #10 and #20 Big Blue Filter Housings
Replaces W10-OR, OR-100 Culligan O-Rings
Not Compatible With Pentek Big Clear Housings
INSTALLATION & USE

How to Replace Your Filter Housing O-Ring

  1. Turn off water supply and depressurize the housing by opening the pressure relief button or valve
  2. Remove the old O-ring and clean the groove thoroughly with a damp cloth to remove any debris or residue
  3. Apply a thin coat of food-grade silicone lubricant to the new Pentek 151122 O-ring
  4. Seat the O-ring evenly in the housing groove, ensuring it sits flat without twists or folds
  5. Hand-tighten the housing sump and gradually restore water pressure while checking for leaks
COMPATIBILITY

Compatible Filter Housing Brands

The Pentek 151122 O-Ring fits Big Blue and Heavy-Duty #10 and #20 filter housings from Pentek, Culligan, Ametek, US Filter, Plymouth Products, Kleen Plus, and American Plumber. This cross-brand compatibility makes it a reliable replacement seal for most standard 10-inch and 20-inch Big Blue housings. Note that this O-ring is not designed for Pentek Big Clear housings, which require a different seal dimension.

🔧 Pro Tip: Inspect your O-ring every time you change the filter cartridge. Even small cracks or stretching can cause slow leaks that waste water and reduce system pressure. Keep a spare Pentek 151122 on hand so you're never caught without a replacement during routine maintenance.
$4.52

Original: $12.92

-65%
Pentek (151122) Replacement O-Ring for #10 or #20 Big Blue Filter Housing—

$12.92

$4.52

Description

The Pentek 151122 O-Ring is an FDA-grade Buna-N replacement seal engineered for Big Blue and Heavy-Duty filter housings across major brands. This 5.5-inch inner diameter ring ensures a leak-proof seal when properly lubricated and installed according to manufacturer guidelines.
SPECIFICATIONS

Pentek 151122 O-Ring Technical Details

Model Number Pentek 151122
Material FDA-Grade Buna-N (Nitrile Rubber)
Inner Diameter (ID) 5.5 inches
Outer Diameter (OD) 5.75 inches
Housing Compatibility #10 and #20 Big Blue Filter Housings
Replaces W10-OR, OR-100 Culligan O-Rings
Not Compatible With Pentek Big Clear Housings
INSTALLATION & USE

How to Replace Your Filter Housing O-Ring

  1. Turn off water supply and depressurize the housing by opening the pressure relief button or valve
  2. Remove the old O-ring and clean the groove thoroughly with a damp cloth to remove any debris or residue
  3. Apply a thin coat of food-grade silicone lubricant to the new Pentek 151122 O-ring
  4. Seat the O-ring evenly in the housing groove, ensuring it sits flat without twists or folds
  5. Hand-tighten the housing sump and gradually restore water pressure while checking for leaks
COMPATIBILITY

Compatible Filter Housing Brands

The Pentek 151122 O-Ring fits Big Blue and Heavy-Duty #10 and #20 filter housings from Pentek, Culligan, Ametek, US Filter, Plymouth Products, Kleen Plus, and American Plumber. This cross-brand compatibility makes it a reliable replacement seal for most standard 10-inch and 20-inch Big Blue housings. Note that this O-ring is not designed for Pentek Big Clear housings, which require a different seal dimension.

🔧 Pro Tip: Inspect your O-ring every time you change the filter cartridge. Even small cracks or stretching can cause slow leaks that waste water and reduce system pressure. Keep a spare Pentek 151122 on hand so you're never caught without a replacement during routine maintenance.
Pentek (151122) Replacement O-Ring for #10 or #20 Big Blue Filter Housing | Isopure Water