Refrigerator Filters
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  • PRO-PRODUCTS-GP10C

    Pro Products Poly Guard Hard Water Scale & Rust Preventer (GP10C)

    Special Order
    Used in 1.5 lb cartridges that fit into standard 10-inch whole house water filtration system housings
    Price Per Item
    2 PACK $51.44
    3 PACK $49.84
    4 PACK $48.25
    6 PACK $46.66
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    Deliver Every:
    Estimated Shipping Date:
    Between 11/02/25 and 11/07/25
    • Ships fast!

    • Certified to meet NSF/ANSI Standard 60 for drinking water additives

    • Helps protect water systems and appliances from damage caused by hard water, rust and iron

    Features & Specs
    Package Qty: 1
    Manufacturer: Pro Products
    Manufacturer's Id: GP10C
    UPC: 818125000627
    Actual Size (in): 9-1/2 inches (height) x 3 inches (outside diameter)
    Media: Poly Guard Crystals
    Operating Temperature (°F): 40 - 100
    Operating Temperature (°C): 4.4 - 37.8
    Brand: Pro Products
    Height (in): 9.5 in
    Outside Diameter (in): 3 in
    Country of Origin: United States
    Flow Rate (gpm): 5.0
    Downloads
    Contaminants Reduced
  • Iron
  • Rust and Corrosion
  • Filter Life
    Filter Life (gallons): 30000
    Filter Life (months): 6 months

    Product Overview

    • Pro Products Poly Guard® Hard Water Scale & Rust Preventer - protects plumbing systems, appliances, and equipment from hard water damage and corrosion
    • Safe & Economical Solution - treats hard water and iron without requiring a water softener
    • Made in the USA - formulated for reliable performance and consistent results
    • NSF Certified - meets NSF/ANSI/CAN Standard 60 for drinking water additives

    Key Benefits

    • Prevents Scale & Rust Build-Up - reduces hard water scale, iron deposits, and rust formation in plumbing and appliances
    • Extends Equipment Lifespan - forms a protective coating on interior surfaces to reduce corrosion and prevent leaching of copper and lead
    • Long-Lasting Treatment - one cartridge treats up to 30,000 gallons of water and lasts up to 6 months
    • Versatile Protection - ideal for water heaters, food service equipment, and household water systems
    • Effective Performance Range - operates within 40-125°F (4.4-37.8°C) water temperatures

    Usage Instructions

    • Cartridge Application - fits 10" standard whole-house filter housings
    • Crystal Capacity - holds 1.5 lbs. of Poly Guard® crystals, designed to slowly dissolve into the water supply
    • Maintenance Schedule - replace cartridge or crystals every 30,000 gallons or every 6 months for continued protection
    • Performance Ratings – filters up to 12 GPG hardness and 1 PPM iron to minimize staining and buildup

    PRO-PRODUCTS-GP10C   is comparable with the following part number(s)

    • GP10C
    • GP10-C