• Product Description

    Ensure a reliable, leak-free seal for your Pentek and Pentair Big Blue filter housings with this 5-pack of genuine 151122 O-rings. Crafted from premium Buna-N (nitrile butadiene rubber), these replacement seals deliver outstanding resistance to chemicals, oils, and high-pressure water systems. Designed to fit standard 5.5" ID × 5.8" OD filter housings, each O-ring measures 0.165" in thickness to maintain optimum compression and long-term durability. Whether you’re performing routine maintenance or a full housing rebuild, these O-rings provide the perfect fit and performance you need.

    Key Features

    • Pack of 5 replacement O-rings for Pentek Pentair Big Blue filter housings
    • Inner Diameter (ID): Approximately 5.5 inches
    • Outer Diameter (OD): Approximately 5.8 inches
    • Cross-section Thickness: Approximately 0.165 inches
    • Material: Buna-N (nitrile butadiene rubber) for superior chemical and abrasion resistance
    • Maintains a watertight seal under high-pressure conditions

    Technical Specifications

    Specification

    Details

    Part Number

    151122

    Quantity

    5 O-rings per pack

    Material

    Buna-N (nitrile butadiene rubber)

    Inner Diameter (ID)

    5.5 inches (approx. 140 mm)

    Outer Diameter (OD)

    5.8 inches (approx. 147 mm)

    Thickness

    0.165 inches (approx. 4.2 mm)

    Temperature Range

    -40°F to 250°F (-40°C to 121°C)

    Chemical Resistance

    Oils, solvents, acids, alkalis, and water

    Compatibility & Applications

    These 151122 O-rings are precision-engineered to replace worn or damaged seals in a variety of Pentek and Pentair Big Blue filter housings, including:

    • Pentek Big Blue 10″ and 20″ filtration systems
    • Pentair Big Blue standard and high-capacity housings
    • Aftermarket and OEM Blue filter cartridges

    Ideal for residential, commercial, and light industrial water filtration installations, these O-rings prevent leaks, maintain consistent water pressure, and extend the life of your filters.

    Installation Tips & Maintenance

    1. Turn off the water supply and relieve housing pressure before disassembly.
    2. Remove the old O-ring and clean the groove, removing debris or scale buildup.
    3. Apply a thin coat of food-grade silicone lubricant to the new O-ring to aid seating.
    4. Carefully press the O-ring into the groove, ensuring it lies flat with no twists.
    5. Reassemble the filter housing and tighten according to manufacturer specifications.

    Regularly inspect your O-ring during filter changes and replace annually or if signs of wear appear.

    Why Choose Our 151122 O-Rings?

    Our factory-direct sourcing cuts out the middleman, delivering OEM-quality replacement seals at an unbeatable value. Each Buna-N O-ring is molded to tight tolerances for a perfect seal, helping you avoid costly leaks and downtime. Backed by responsive customer support and a satisfaction guarantee, these O-rings are the smart choice for any Pentek or Pentair Big Blue filtration system.

    Upgrade your filtration maintenance kit today—add this 5-pack of 151122 O-rings for Pentek Pentair Big Blue housings to your cart and protect your water system with confidence.