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Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filtration repair parts.  From one water filter or reverse osmosis membrane to case quantity discounts.
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Harmsco ® Pool and Spa Replacement Water Filters

Pool Filters By Pool Manufactures Index
Spa Filters By Spa Manufacturers Index
 
Harmsco H-4326-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco-H-4326-AM ® Replacement Pool Water Filter Cartridge


Price Each: $41.57
Sale Price: $26.99
Savings: $14.58

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Harmsco ® H-4326-AM Antimicrobial Replacement Water Filter Cartridge

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.

Harmsco H-4335 Replacement Water Filter Cartridge


Harmsco-H-4335 ® Replacement Pool Water Filter Cartridge


Price Each: $41.37
Sale Price: $26.99
Savings: $14.38

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Harmsco ® H-4335 Replacement Water Filter Cartridge

Harmsco ® H-4335 Replacement Water Filter Cartridge - Rainbow 35 sq.ft. Replaces RA35TC / C-4335 / PRB35-IN. 9 3/16" length X 5" diameter.

Harmsco H-4607 Replacement Water Filter Cartridge


Harmsco-H-4607 ® Replacement Pool Water Filter Cartridge


Price Each: $13.99
Sale Price: $9.99
Savings: $4.00

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Harmsco ® H-4607 Replacement 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.

Harmsco H-4950 Replacement Water Filter Cartridge


Harmsco-H-4950 ® Replacement Pool Water Filter Cartridge


Price Each: $32.99
Sale Price: $26.99
Savings: $6.00

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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.

Harmsco H-4950-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco-H-4950-AM ® Antimicrobial Replacement Spa Water Filter Cartridge


Price Each: $36.99
Sale Price: $28.99
Savings: $8.00

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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.

Harmsco H-6430 Replacement Water Filter Cartridge


Harmsco-H-6430 ® Replacement Pool Water Filter Cartridge


Price Each: $32.99
Sale Price: $24.99
Savings: $8.00

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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.

Harmsco H-7447 Replacement Water Filter Cartridge


Harmsco-H-7447 ® Replacement Pool Water Filter Cartridge


Price Each: $53.99
Sale Price: $47.99
Savings: $6.00

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Harmsco ® H-7447 Replacement Water Filter Cartridge

Harmsco ® H-7447 Replacement Water Filter Cartridge - Replaces CX470-RE, C-7447 & PA50-SV. Hayward 50 sq.ft., Sta-Rite PRC50.

Harmsco H-7477 Replacement Water Filter Cartridge


Harmsco-H-7477 ® Replacement Pool Water Filter Cartridge


Price Each: $65.99
Sale Price: $58.99
Savings: $7.00

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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.

Harmsco H-7487 Replacement Water Filter Cartridge


Harmsco-H-7487 ® Replacement Pool Water Filter Cartridge


Price Each: $79.99
Sale Price: $72.99
Savings: $7.00

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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.

Harmsco H-7626 Replacement Water Filter Cartridge


Harmsco-H-7626 ® Replacement Pool Water Filter Cartridge


Price Each: $32.99
Sale Price: $27.99
Savings: $5.00

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Harmsco ® H-7626 Replacement Water Filter Cartridge

Harmsco ® H-7626 Replacement Water Filter Cartridge - Replaces HA25TC-3, C-7626 & PA25. Hayward CX250-RE 25 sq.ft.

Harmsco H-7656 Replacement Water Filter Cartridge


Harmsco-H-7656 ® Replacement Pool Water Filter Cartridge


Price Each: $51.99
Sale Price: $46.99
Savings: $5.00

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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.

Harmsco H-7699 Replacement Water Filter Cartridge


Harmsco-H-7699 ® Replacement Pool Water Filter Cartridge


Price Each: $72.99
Sale Price: $67.99
Savings: $5.00

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Harmsco ® H-7699 Replacement Water Filter Cartridge

DISCONTINUED AND NO LONGER AVAILABLE. Harmsco ® H-7699 Replacement Water Filter Cartridge - Replaces PF100TC-3, C7699 & PFAB100. PAC FAB 100 sq.ft. MA100 & MY100. 22 height X 7 7/8 diameter.

Harmsco H-8409-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco-H-8409-AM ® Replacement Pool Water Filter Cartridge


Price Each: $93.99
Sale Price: $84.99
Savings: $9.00

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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.

Harmsco H-8412-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-8412-AM ® Replacement Pool Water Filter Cartridge
 


Price Each: $119.99
Sale Price: $99.99
Savings: $20.00

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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.

Harmsco H-8417-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-8417-AM ® Replacement Pool Water Filter Cartridge


Price Each: $169.99
Sale Price: $139.99
Savings: $30.00

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Harmsco ® H-8417-AM Antimicrobial Replacement Water Filter Cartridge

Harmsco ® H-8417-AM Antimicrobial Replacement Water Filter Cartridge - Replaces HA175TC-3, C-8417 & PA175. Hayward 175 sq.ft. CX1750-RE. 28 height X 9 diameter. Step up to Premium Antimicrobial Construction.

Harmsco H-8600 Replacement Water Filter Cartridge


Harmsco H-8600 ® Replacement Pool Water Filter Cartridge


Price Each: $75.99
Sale Price: $67.99
Savings: $8.00

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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.

Harmsco H-8600-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-8600-AM ® Replacement Pool Water Filter Cartridge


Price Each: $87.99
Sale Price: $77.99
Savings: $10.00

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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.

Harmsco H-9401 Replacement Water Filter Cartridge


Harmsco H-9401 ® Replacement Pool Water Filter Cartridge


Price Each: $74.99
Sale Price: $67.99
Savings: $7.00

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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.

Harmsco H-9402-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-9402-AM  ® Replacement Pool Water Filter Cartridge


Price Each: $106.99
Sale Price: $92.99
Savings: $14.00

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Harmsco ® H-9402-AM Antimicrobial Replacement Water Filter Cartridge

Harmsco ® H-9402-AM Antimicrobial Replacement Water Filter Cartridge - Step up to Premium Quality Of Antimicrobial Construction. Replaces PWW 100 & C-9402. REC Warehouse Waterway 100 sq.ft. 19 5/16 X 9 15/16 diameter.

Harmsco H-9403-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-9403-AM ® Replacement Pool Water Filter Cartridge


Price Each: $139.99
Sale Price: $119.99
Savings: $20.00

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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.

Harmsco H-9415-AM Antimicrobial Replacement Water Filter Cartridge


Harmsco H-9415-AM ® Replacement Pool Water Filter Cartridge


Price Each: $137.99
Sale Price: $119.99
Savings: $18.00

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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.

Harmsco H-9650 Replacement Water Filter Cartridge


Harmsco H-9650 ® Replacement Pool Water Filter Cartridge


Price Each: $56.99
Sale Price: $48.99
Savings: $8.00

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Harmsco ® H-9650 Replacement Water Filter Cartridge

Harmsco ® H-9650 Replacement Water Filter Cartridge - Replaces JCFT50TC-4, C-9650 & PJ50. Jacuzzi 50 sq.ft. CFR50 & CFT50. 9 13/16 height X 9 7/8 diameter.

Harmsco HC/90 Water Filter


Harmsco HC/90 ® Replacement Pool Water Filter Cartridge


Price Each: $148.65
Sale Price: $94.99
Savings: $53.66

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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.

Harmsco HC 170 Series - 1, 5 and 20 Micron Hurricane Filter Cartridges
 

Price Each: $199.99
Sale Price: $159.99
Savings: $40.00

HC/170 Micron Size


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Harmsco HC 170 WaterBetter Series - 1, 5 and 20 Micron Hurricane Filter Cartridges

Harmsco HC 170 WaterBetter Series - 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.

Harmsco OTC/6-4 Water Filter


Harmsco OTC/6-4 ® Replacement Pool Water Filter Cartridge


Price Each: $8.99
Sale Price: $6.99
Savings: $2.00

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Harmsco ® OTC/6-4 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

Harmsco ST/105 Water Filter


Harmsco ST/105
 ® Replacement Pool Water Filter Cartridge


Price Each: $105.00
Sale Price: $89.99
Savings: $15.01

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Harmsco ® ST/105 Water Filter

Harmsco ® ST/105 Water Filter - Fits Bestfilter BF-105. Filbur cross reference # FC 6110. 19 1/2" height.

Harmsco ST-155 Water Filter


Harmsco ST-155 ® Replacement Pool Water Filter Cartridge


Price Each: $140.10
Sale Price: $122.99
Savings: $17.11

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Harmsco ® ST-155 Water Filter

Harmsco ® ST-155 Water Filter - Fits Best Filter model BF155. Filbur cross reference number FC 6115. 29 1/16" height.

Harmsco ST-6 Water Filter


Harmsco ST-6 ® Replacement Pool Water Filter Cartridge


Price Each: $5.50

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Harmsco ® ST-6 Water Filter

Harmsco ® ST-6 Water Filter - Harmsco Bestfilter cluster water filter cartridges. 9 3/4" height

Harmsco TC-155 Water Filter


Harmsco TC-155 ® Replacement Pool Water Filter Cartridge


Price Each: $140.10
Sale Price: $119.99
Savings: $20.11

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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

Pool and Spa Bacteria Water Tests
 


Price Each: $14.99

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Pool and Spa Bacteria Tests

2 Pool And Spa Bacteria Tests Per Package. Easy to use. Do it yourself. Results in 20 minutes. Test for harmful bacteria for safety.

See Other Water Testing Kits


Be sure to check our Pure Drinking Water 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 for drinking water systems online at our Installation & Trouble shooting Guide.

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