Replacement water filters, RO reverse osmosis membranes and whole house filter systems. Refrigerator water filters, pool and spa filter. Pentek, OMNIFILTER water filters. Chiller Daddy water chillers

Rainbow Plastics (Pentair) Pool Water Filters

Rainbow Plastics ® Pentair Compatible Pool Replacement Water Filters
  1. Regular Price: $37.99

    Special Price $26.99

    As low as: $23.99
    Harmsco ® H-4326-AM Antimicrobial Replacement Pool Water Filter Cartridge - Step up to Premium Antimicrobial Construction. Cross reference RA25TC-3, Unicel C-4625 - C-4326, Pleatco PRB 25-IN, Filbur FC 4375 - FC 2375. 13 3/8 inches height x 4 15/16 inches diameter. Learn More
  2. $26.99
    Harmsco ® H-4335 Replacement Water Filter Cartridge - Rainbow 35 sq.ft. Replaces RA35TC / C-4335 / PRB35-IN. 9 3/16" length X 5" diameter. Learn More
  3. Regular Price: $38.99

    Special Price $26.99

    As low as: $23.99
    Harmsco ® H-4950 Replacement Water Filter Cartridge - Unicel cross reference # C-4950. RA50TC-3 & PRB50-IN. Rainbow 50 sq.ft. 13 3/8 inches height x 4 15/16 inches diameter. Learn More
  4. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    2 Pool And Spa Bacteria Tests Per Package. Easy to use. Do it yourself. Results in 20 minutes. Test for harmful bacteria for safety. Learn More

Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.