Parker M39R20A String-wound Cartridge Filter 1 Micron

Product Description

The PARKER M39R20A is a string-wound polypropylene cotton cartridge filter designed for plumbing and water filtration applications. Measuring 20 inches in length with a 2.5-inch outside diameter, this filter delivers sediment removal down to 1 micron, making it effective for capturing fine particulates including silt, dirt, rust, and sand. The string-wound construction creates a graded density from the outer surface to the inner core, which improves dirt-holding capacity compared to flat-media alternatives. The polypropylene cotton media and polypropylene plastic core meet FDA material grade standards, supporting use in potable water systems where material compliance matters.

This cartridge filter is suited for residential and light commercial plumbing systems, whole-house sediment filtration, pre-treatment ahead of softeners or reverse osmosis units, and industrial process water lines. It is rated for a maximum working temperature of 120 degrees F, making it appropriate for cold and ambient-temperature water service. Licensed plumbers and water treatment technicians are the primary installers. The 1-micron rating is well matched to applications requiring tight sediment control upstream of sensitive equipment or point-of-use fixtures.

Key Features

• 1-micron filtration rating for fine sediment removal
• String-wound construction provides graded density and high dirt-holding capacity
• Polypropylene cotton media with polypropylene plastic core
• FDA material grade — suitable for potable water service
• Rated to 120 degrees F maximum working temperature
• 20-inch length fits standard big-blue and comparable filter housings

Compatibility

Designed as an OEM-style replacement cartridge for standard 20-inch string-wound filter housings accepting a 2.5-inch outside diameter cartridge, commonly used in residential and light commercial sediment filtration systems.

Installation Notes

Installation is performed by a licensed plumber or qualified water treatment technician. Shut off the water supply and relieve system pressure before opening the filter housing. Follow the housing manufacturer's torque guidance for the sump cap and inspect the o-ring for wear before reinstalling. Replace the cartridge on a schedule based on influent water quality and observed pressure drop across the filter.