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The PARKER WC39R20A is a string-wound cartridge filter designed for plumbing and water treatment applications. Built from acetate cotton wound over a polypropylene core, it delivers 1-micron filtration to remove sediment, dirt, sand, and fine particulates from water lines. The 20-inch length and 2.5-inch outside diameter fit standard big-blue and jumbo-style filter housings. Rated for water temperatures up to 120 degrees F, this cartridge suits cold and warm water supply lines in residential and light commercial systems. Plumbers and water treatment technicians install it as a point-of-entry or point-of-use sediment stage.
The WC39R20A is used in whole-house sediment filtration systems, pre-filtration ahead of softeners or reverse osmosis units, and commercial water conditioning setups where fine particulate control is required. The 1-micron rating makes it effective for fine sediment loads ahead of sensitive downstream equipment. It installs in standard 20-inch jumbo filter housings and is suited to both new installations and filter replacement service calls.
Designed as an OEM-style replacement cartridge for standard 20-inch jumbo cartridge filter housings used in residential and light commercial water treatment systems.
Installation is typically performed by a licensed plumber or water treatment technician. Shut off the water supply and relieve line pressure before opening the filter housing. Follow local plumbing codes, including IPC guidelines, for potable water filtration installations. Replace the cartridge at the manufacturer-recommended service interval or when pressure differential across the housing indicates loading.
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