Big Blue Buna-N replacement O-ring.  The rubber O-ring provides the water-tight seal between the cap and housing, and should be replaced after every cartridge change.

Be sure to lubricate with clean silicone grease and properly seat in the groove below the threads of the housing to avoid leaks.

The Superb Wrench filter housing metal wrench is made to replace the plastic wrench that breaks when removing a filter housing unit. The wrench is made out of 7 gauge zinc-plated steel that will not break, bend or strip the housing unit when stuck . The handle is long for extra leverage, and a directional arrow is printed on the rubberized handle with the words "loosen" to prevent turning in the wrong direction.  It makes the Superb Wrench virtually indestructible while making filter change easy.

• Fits #20 big blue whole house water filters
• Replaces the plastic SW-4 wrench
• Inside diameter 6 in.
• Fits the following housing : American plumber W2010-PR / 152015/ W2015-PR / 152017 / 152022 / 144368
• Fits the following housing : Pentek 150237 / 150239 /150469, Pentek BBFS-22, Pentek 144368
• Fits the following Housings: Ametek Kleen-Plus 144368
• Fits the following Housings: Culligan 144368
• Fits the following Housings: Keystone
• Fits the following Housings: whirlpool WHKF-DWHBB

Use this filter wrench to easily loosen 20" Big Blue filter housings when replacing cartridges.

Zinc Coated Steel Mounting bracket for Big Blue housings.  Includes screws for attaching the filter housing.

For 20" Big Blue Housings. 
GAC Series cartridges effectively reduce unwanted tastes, odor and chlorine taste & odor from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption.

The construction of the cartridge allows water to enter at one end and pass through the entire length of the carbon bed before exiting the other end of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20-micron post filter helps reduce carbon fines and other suspended particles from the filtered water. The post-filter is permanently fastened to an innovative support basket ensuring that it is firmly secured and eliminating any potential for bypass.

GAC Series cartridges effectively provide good general-purpose drinking water filtration.

The RFFE20-BB filter cartridge is designed to provide an easy and effective method of reducing iron in water, which greatly improves the taste.

This cartridge helps to eliminate the orange and brown stains often found in sinks, toilets, tubs and other plumbing fixtures. It also reduces the possibility of damage to pipes and water heaters and reduces up to 3 ppm dissolved iron.

It adds no harmful chemicals to the water, making it completely safe for drinking water applications.

The RFFE20-BB cartridge is designed for use in the PENTEK 20-inch BB filter housings and should be installed on the main cold water line after the pressure tank or water meter. For best results, pre-sediment and post-carbon treatment is recommended.