Reverse Osmosis System Filters, RO Membranes and Parts

Harmsco Water Filters ®

Harmsco ® Replacement Water Filters & WaterBetter Replacement Sediment Filters
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  1. Harmsco 801 HIF 0.35 sub micron Replacement Sediment Filter
    Harmsco 801 HIF 0.35 sub micron Replacement Sediment Filter
    Harmsco 801 0.35 micron HIF Replacement Sediment highly efficient filter cartridges made of pleated Polyester-PlusTM filter media for low pressure drop, high flow capability, increased contaminant removal, long filter runs, reusability and the lowest cost per gallon filtered. • Pleated design with up to 50% more surface area than competitive filters resulting in superior performance & increased contaminant removal • Longer filtration runs for fewer change-outs and less maintenance • Low pressure drop • Thermally bonded for longer usable life • FDA approved materials - NSF 61 certified • Engineered media for superior performance. Learn More
    $13.99 Special Price $8.99 As low as $6.99
  2. Harmsco ® H-8600-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8600-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8600-AM Antimicrobial Replacement Pool Water Filter Cartridge - Step up to Premium Antimicrobial Construction. Cross reference HA8OTC-3, Unicel #C-8600, Pleatco # PA 80 and Filbur # FC 1280. 17 1/2 inches height x 8 1/2 inches diameter. Learn More
    $139.99 Special Price $79.99 As low as $74.99
  3. Harmsco ® H-4607 Replacement Sediment Water Filter Cartridge
    Harmsco ® H-4607 Replacement Sediment Water Filter Cartridge
    Harmsco ® H-4607 Pleated Replacement Water Filter Cartridge - For F120 & DR7. Repalces F120TC / C-4607 / PC7-120 Coleco with core. 5 sq.ft. 7 15/16" length x 4 1/4" diameter. Learn More
    $12.99 Special Price $7.99 As low as $6.29
  4. Harmsco ® H-4950 Replacement Water Filter Cartridge
    Harmsco ® H-4950 Replacement Water Filter Cartridge
    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
    $38.99 Special Price $26.99 As low as $23.99
  5. Harmsco ® H-4950-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-4950-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-4950-AM Antimicrobial Replacement Water Filter Cartridge - Step up to Premium Antimicrobial Construction. Unicel cross reference # C-4950. Replaces RA50TC-3, C-4650 & PRB50-IN. Rainbow 50 sq.ft. 13 3/8 inches height x 4 15/16 inches diameter. Fantastic Antimicrobial Spa Filter. Learn More
    $39.99 Special Price $28.99 As low as $26.99
  6. Harmsco ® H-6430 Replacement Water Filter Cartridge
    Harmsco ® H-6430 Replacement Water Filter Cartridge
    Harmsco ® H-6430 Replacement Spa Water Filter Cartridge - Replaces WA30TC-3, C-6430 & PWK30. Watkins 30 sq.ft. Fits all models starting from 1991. 10 1/2" height X 6" diameter. Learn More
    $36.99 Special Price $24.99 As low as $22.99
  7. Harmsco ® H-7477 Replacement Water Filter Cartridge
    Harmsco ® H-7477 Replacement Water Filter Cartridge
    Harmsco ® H-7477 Replacement Water Filter Cartridge - Hayward 75 sq.ft. Sta-Rite PRC 75 compatible. Replaces CX570-RE / C-7477 / PA75-SV. Learn More
    $99.99 Special Price $58.99 As low as $54.99
  8. Harmsco ® H-7487 Replacement Water Filter Cartridge
    Harmsco ® H-7487 Replacement Water Filter Cartridge
    Harmsco ® H-7487 Replacement Water Filter Cartridge - Replaces CX870-RE, C-7487 & PA100-N. Hayward 100 sq.ft.. 25 1/2 height x 6 7/8 diameter. Learn More
    $119.99 Special Price $72.99 As low as $69.29
  9. Harmsco ® H-7656 Replacement Water Filter Cartridge
    Harmsco ® H-7656 Replacement Water Filter Cartridge
    Harmsco ® H-7656 Replacement Water Filter Cartridge - Replaces HA50TC-3, C-7656 & PA50. Hayward CX500-RE, 50 sq.ft. 19 3/4 height X 6 4/8 diameter. Learn More
    $79.99 Special Price $46.99 As low as $43.99
  10. Harmsco ® H-8409-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8409-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8409-AM Antimicrobial Replacement Water Filter Cartridge - Step up to Premium Quality Of Antimicrobial Construction. Replaces HA90TC-3, C-8409 & PA90. Hayward CX900 RE. 90 sq.ft. 17 5/16" height X 8 7/8" diameter. Learn More
    $129.99 Special Price $84.99 As low as $79.99
  11. Harmsco ® H-8412-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8412-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-8412-AM Antimicrobial Replacement Water Filter Cartridge - Replaces HA120TC-3, C-8412 & PA120. Hayward 120 sq.ft. CX1200-RE. #0296 Step up to Premium Antimicrobial Construction. You deserve the best. Learn More
    $129.99 Special Price $99.99 As low as $93.99
  12. Harmsco ® H-8600 Replacement Water Filter Cartridge
    Harmsco ® H-8600 Replacement Water Filter Cartridge
    Harmsco ® H-8600 Replacement Water Filter Cartridge - Replaces HA80TC-3, C-8600 & PA80 and Hayward CX800-RE. 75 sq.ft. 17 1/2 height X 8 1/2 diameter. Learn More
    $99.99 Special Price $67.99 As low as $62.99
  13. Harmsco ® H-9401 Replacement Water Filter Cartridge
    Harmsco ® H-9401 Replacement Water Filter Cartridge
    Harmsco ® H-9401 Replacement Water Filter Cartridge - Replaces PWW 75 & C-9401. REC Warehouse Waterway 75 sq.ft. 13 1/8 height x 9 7/8 diameter. Learn More
    $89.99 Special Price $67.99 As low as $62.99
  14. Harmsco ® H-9403-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-9403-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-9403-AM Antimicrobial Replacement Water Filter Cartridge - Step up to Premium Quality Antimicrobial Construction. Replaces PWW150 & C-9403. REC Warehouse Waterway 150 sq.ft. 25 height x 10 diameter. Learn More
    $159.99 Special Price $119.99 As low as $108.75
  15. Harmsco ® H-9415-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-9415-AM Antimicrobial Replacement Water Filter Cartridge
    Harmsco ® H-9415-AM Sure Safe Antimicrobial Replacement Water Filter Cartridge - Replaces APP150TC-4 & C-9415. Pentair American Products Clean & Clear Predator. 150 SQ.FT. 31 height X 10 diameter. Step up to Premium Antimicrobial Construction For Best Filtration. Learn More
    $149.99 Special Price $119.99 As low as $108.78
  16. Harmsco ® HB-20-50W-AM Big Blue 20 Inch Antimicrobial Water Filter
    Harmsco ® HB-20-50W-AM Big Blue 20 Inch Antimicrobial Water Filter
    Harmsco ® HB-20-50W-AM Big Blue 20 Inch Antimicrobial Water Filter. Antimicrobial Replacement Water Filter Cartridge - Step up to The Premium Quality Of Antimicrobial Construction. Cleanable and reusable in most applications; individually shrink wrapped. Flow rates Up to 130 GPM (56 LPM). Order a case and save even more. Learn More
    $54.99 Special Price $39.99 As low as $35.99
  17. Harmsco HC 170 WaterBetter Series - 0.35, 1, 5 and 20 Micron Hurricane Filter Cartridges
    Harmsco HC 170 WaterBetter Series - 0.35, 1, 5 and 20 Micron Hurricane Filter Cartridges
    Harmsco HC 170 WaterBetter Series - 0.35, 1, 5 and 20 Micron Hurricane Filter Cartridges. Pleated Sediment Cartridges are rated for temperatures to 140°F (60°C).* Polyester-Plus™ filter media is cleanable and cartridges are reusable in most applications and micron ratings. Cartridges can be used in liquids with a pH of 3 to 11. Cartridge dimensions: 30-3/4” x 7-3/4” (OD) x 3” (FPT). Packaged one per carton. Hurricane® cartridges are capable of 50 psi ÄP. Learn More
    $199.99 Special Price $159.99 As low as $142.99
  18. Harmsco ® Hurricane HC/90 WaterBetter Pool Water Filter
    Harmsco ® Hurricane HC/90 WaterBetter Pool Water Filter
    Harmsco ® HC/90 Pool Water Filter For Hurricane WaterBetter Water Filters - Fits HUR 90 housings, 0315, Tropi-Clean, Supertuf and others. 19 1/2 height x 7 3/4 diameter. Learn More
    $119.99 Special Price $84.99 As low as $79.99
  19. Harmsco ® OTC/6-4 Replacement Water Filter
    Harmsco ® OTC/6-4 Replacement Water Filter
    Harmsco ® OTC/6-4 Water Filter - Harmsco Bestfilter Cluster water filter cartridges. Tropi-Clean. 20 microns nominal. 6 sq.ft. nominal 9 3/4 height x 2 3/4 diameter. PT. NO. OTC/6-4 Learn More
    $8.99 Special Price $6.99 As low as $6.24
  20. Harmsco ® ST/105 Water Filter
    Harmsco ® ST/105 Water Filter
    Harmsco ® ST/105 Water Filter - Fits Bestfilter BF-105. Filbur cross reference # FC 6110. 19 1/2" height. Learn More
    $139.99 Special Price $89.99 As low as $79.99
  21. Harmsco ® ST-155 Replacement Water Filter
    Harmsco ® ST-155 Replacement Water Filter
    Harmsco ® ST-155 Water Filter - Fits Best Filter model BF155. Filbur cross reference number FC 6115. 29 1/16" height. Learn More
    $159.99 Special Price $122.99 As low as $114.99
  22. Harmsco ® TC-155 Water Filter
    Harmsco ® TC-155 Water Filter
    Harmsco ® TC-155 Water Filter - Better Filter Cross Reference #BF155. Filbur cross reference # FC 6115. 29 1/16 height X 8" diameter. #0303 Learn More
    $149.99 Special Price $119.99 As low as $109.99
  23. Harmsco 801-10 10 Micron 9.75" Inch HIF Replacement Water Filter #Harm_801-10
    Harmsco 801-10 10 Micron 9.75" Inch HIF Replacement Water Filter #Harm_801-10

    Harmsco 801-10 10 Micron 9.75" Inch HIF Water Filter.  Harmsco 801 HIF Replacement Sediment highly efficient filter cartridges made of pleated Polyester-PlusTM filter media for low pressure drop, high flow capability, increased contaminant removal, long filter runs, reusability and the lowest cost per gallon filtered. • Pleated design with up to 50% more surface area than competitive filters resulting in superior performance & increased contaminant removal • Longer filtration runs for fewer change-outs and less maintenance • Low pressure drop • Thermally bonded for longer usable life • FDA approved materials - NSF 61 certified • Engineered media for superior performance. 

    Learn More
    $12.99 Special Price $8.99 As low as $6.99
  24. Harmsco 801-100 100 Micron 9.75" Inch HIF Replacement Water Filter
    Harmsco 801-100 100 Micron 9.75" Inch HIF Replacement Water Filter

    Harmsco 801-100 100 Micron 9.75" Inch HIF Water Filter. Harmsco 801 HIF Replacement Sediment highly efficient filter cartridges made of pleated Polyester-PlusTM filter media for low pressure drop, high flow capability, increased contaminant removal, long filter runs, reusability and the lowest cost per gallon filtered. • Pleated design with up to 50% more surface area than competitive filters resulting in superior performance & increased contaminant removal • Longer filtration runs for fewer change-outs and less maintenance • Low pressure drop • Thermally bonded for longer usable life • FDA approved materials - NSF 61 certified • Engineered media for superior performance. 

    Learn More
    $12.99 Special Price $8.99 As low as $6.99
  25. Harmsco 801-20 20 Micron 9.75" Inch HIF Replacement Water Filter
    Harmsco 801-20 20 Micron 9.75" Inch HIF Replacement Water Filter

    Harmsco 801-20 20 Micron 9.75" Inch HIF Water Filter.  Harmsco 801 HIF Replacement Sediment highly efficient filter cartridges made of pleated Polyester-PlusTM filter media for low pressure drop, high flow capability, increased contaminant removal, long filter runs, reusability and the lowest cost per gallon filtered. • Pleated design with up to 50% more surface area than competitive filters resulting in superior performance & increased contaminant removal • Longer filtration runs for fewer change-outs and less maintenance • Low pressure drop • Thermally bonded for longer usable life • FDA approved materials - NSF 61 certified • Engineered media for superior performance. 

    Learn More
    $12.99 Special Price $8.99 As low as $6.99
  26. Harmsco 801-20HT 20 Micron 9.75" Inch HIF High Temp Replacement Water Filter
    Harmsco 801-20HT 20 Micron 9.75" Inch HIF High Temp Replacement Water Filter

    Harmsco 801-20HT 20 Micron 9.75" Inch HIF High-Temp Water Filter.  Harmsco 801 HIF Replacement Sediment highly efficient filter cartridges made of pleated Polyester-PlusTM filter media for low pressure drop, high flow capability, increased contaminant removal, long filter runs, reusability and the lowest cost per gallon filtered. • Pleated design with up to 50% more surface area than competitive filters resulting in superior performance & increased contaminant removal • Longer filtration runs for fewer change-outs and less maintenance • Low pressure drop • Thermally bonded for longer usable life • FDA approved materials - NSF 61 certified • Engineered media for superior performance. 

    Learn More
    $14.99 Special Price $9.99 As low as $7.99
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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.