Reverse Osmosis System Filters, RO Membranes and Parts

Pentek Sediment Pre Filters 20" X 2 1/2" (See All)

Ametek, Pentek, US Filter, Culligan, Plymouth, American Plumber & Kleen Plus ® Replacement Sediment Water Filters - 20" Long X 2 1/2" Diameter Cartridges
  1. PENTEK- S1-20 Sediment Replacement Water Filter Cartridge- #155303- 1000
    Pentek S1-20 # 155303 S1-20 Sediment Replacement Water Filter Cartridge
    Pentek S1-20 # 155303 S1-20 Sediment Replacement Water Filter Cartridge Compatible With Culligan, Ametek, US Filter, Plymouth, Kleen Plus, American Plumber, Bruner & Many Other Brands. S1-20 Pleated Cellulose 20 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 14 per case, sold individually. Ametek # 155303. S1 series cartridges are economically priced and highly effective at reducing sediment particles down to 20 micron in size. Whole house or point of entry POE filtration to filter out sand, silt, dirt and rust particles that can restrict and plug finer filters, screens or equipment. Order a case and save even more.
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    $22.99 Special Price $14.99 As low as $11.99
  2. Pentek ECP1-20 # 255485 Sediment Replacement Water Filter Cartridges
    Pentek ECP1-20 # 255485 Sediment Replacement Water Filter

    Pentek ECP1-20 # 255485 ECP1-20 Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 20" 1 Micron Pleated Cellulose-Polyester Sediment Water Filter. 20" long X 2 1/2" diameter. 14 per case, sold individually. Ametek # 255485 ECP Series cartridges are manufactured from a special formulation of resin-impregnated cellulose and polyester fibers. Order a case and save even more.

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    $27.99 Special Price $19.99 As low as $16.99
  3. Pentek ECP5-20 # 155414 CP520 Replacement Sediment Water Filter Cartridge
    Pentek ECP5-20 # 155414 CP520 Replacement Sediment Water Filter Cartridge
    Pentek ECP5-20 # 155414 CP520 Replacement Sediment Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Pleated Cellulose-Polyester 5 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 14 per case, sold individually. Ametek # 155414 CP Series cartridges are manufactured from a special formulation of resin-impregnated cellulose and polyester fibers. This construction provides high flow rates and dirt-holding capacities, while maintaining extremely low pressure drops. The media is pleated around a polypropylene core for added strength and the ends are immersed in a thermo-setting vinyl plastisol. Embedding and sealing each end of the pleat block in this fashion fuses the components together forming a unitized end cap and gasket. Order a case and save even more.
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    $17.99 Special Price $15.99 As low as $13.69
  4. Pentek ECP20-20 # 255487 Replacement Sediment Water Filter
    Pentek ECP20-20 # 255487 Replacement Sediment Water Filter
    Pentek ECP20-20 # 255487 ECP20-20 Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 20" 20 Micron Pleated Cellulose-Polyester Sediment Water Filter. 20" long X 2 1/2" diameter. 14 per case, sold individually. Ametek # 255487 ECP Series cartridges are manufactured from a special formulation of resin-impregnated cellulose and polyester fibers. This construction provides high flow rates and dirt-holding capacities, while maintaining extremely low pressure drops. The media is pleated around a polypropylene core for added strength and the ends are immersed in a thermo-setting vinyl plastisol. Embedding and sealing each end of the pleat block in this fashion fuses the components together forming a unitized end cap and gasket. Order a case and save even more.
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    $23.99 Special Price $15.99 As low as $13.99
  5. PENTEK- R30-20 Pleasted Sediment Replacemen Water Filter Cartridge- #155416- 1000
    Pentek R30-20 # 155416 R-30-20 Pleated Sediment Replacement Water Filter Cartridge

    Pentek R30-20 # 155416 R-30-20 Pleated Sediment Replacement Water Filter Cartridge Compatible With Culligan, Ametek, US Filter, Plymouth, Kleen Plus, American Plumber, Bruner & Many Other Brands. Reusable Pleated Polyester Sediment Water Filter. 30 micron - 20" long X 2 1/2" diameter. 14 per case, sold individually. Ametek Pentek # 155416 R Series cartridges are manufactured from a durable, non-woven and reusable polyester fabric that is suitable for a wide range of filtration uses. 

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    $22.99 Special Price $22.95 As low as $18.95
  6. Pentek P1-20 # 155304 P120 Sediment Replacement Water Filter Cartridge
    Pentek P1-20 # 155304 P120 Sediment Replacement Water Filter Cartridge
    Pentek P1-20 # 155304 P120 Sediment Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Spun Polypropylene 1 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155304 P-Series cartridges are manufactured from 100% pure polypropylene fibers. The fibers have been carefully spun together to form a true gradient density from outer to inner surfaces. These cartridges are designed for purity. They will not impart taste, odor or color to the liquid being filtered when used within the recommended temperature limit. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The coreless strength of the cartridges is achieved by sintering the many fibers into a solid matrix. Order a case and save even more.
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    $12.99 Special Price $8.99 As low as $5.99
  7. Pentek P5-20 # 155016 P520 Sediment Replacement Water Filter Cartridge
    Pentek P5-20 # 155016 P520 Sediment Replacement Water Filter Cartridge
    Pentek P5-20 # 155016 P520 Sediment Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Spun Polypropylene 5 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155016 P-Series cartridges are manufactured from 100% pure polypropylene fibers. The fibers have been carefully spun together to form a true gradient density from outer to inner surfaces. These cartridges are designed for purity. They will not impart taste, odor or color to the liquid being filtered when used within the recommended temperature limit. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The coreless strength of the cartridges is achieved by sintering the many fibers into a solid matrix. Order a case and save even more.
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    $13.99 Special Price $8.99 As low as $6.99
  8. Pentek P25-20 # 155226 P2520 Polydepth Sediment Replacement Water Filter Cartridge
    Pentek P25-20 # 155226 P2520 Polydepth Sediment Replacement Water Filter Cartridge

    Pentek P25-20 # 155226 P2520 Polydepth Sediment Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Spun Polypropylene 25 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155226 P-Series cartridges are manufactured from 100% pure polypropylene fibers.  Order a case and save even more.

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    $12.99 Special Price $8.99 As low as $6.99
  9. Pentek PD-1-20 # 155755 PD1-20 Polydepth Sediment Replacement Water Filter Cartridge
    Pentek PD-1-20 # 155755 PD1-20 Polydepth Sediment Replacement Water Filter Cartridge

    Pentek PD-1-20 # 155755 PD1-20 Polydepth Sediment Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Polydepth 1 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155755 The New POLYDEPTH ™ filtration cartridge is constructed of quality polypropylene filter media to ensure high efficiency in the inner layer. The polypropylene filter media is thermally bonded and incorporates a rigid polypropylene center core for increased durability.  Order a case and save even more.

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    $18.99 Special Price $13.99 As low as $10.67
  10. Pentek PD-5-20 # 155756 PD5-20 Polydepth Sediment Replacement Water Filter Cartridges
    Pentek PD-5-20 # 155756 PD5-20 Polydepth Sediment Replacement Water Filter Cartridges

    Pentek PD-5-20 # 155756 PD5-20 Polydepth Sediment Replacement Water Filter Cartridges Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Polydepth 5 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155756 The New POLYDEPTH ™ filtration cartridge is constructed of quality polypropylene filter media to ensure high efficiency in the inner layer. The polypropylene filter media is thermally bonded and incorporates a rigid polypropylene center core for increased durability. Order a case and save even more.

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    $18.99 Special Price $12.99 As low as $10.67
  11. Pentek PD-10-20 # 155757 PD10-20 Polydepth Sediment Replacement Water Filter Cartridge
    Pentek PD-10-20 # 155757 PD10-20 Polydepth Sediment Replacement Water Filter Cartridge
    Pentek PD-10-20 # 155757 PD10-20 Polydepth Sediment Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Polydepth 10 Micron Sediment Water Filter. 20" long X 2 1/2" diameter. 20 per case, sold individually. Ametek # 155757 The New POLYDEPTH™ filtration cartridge is constructed of quality polypropylene filter media to ensure high efficiency in the inner layer. The polypropylene filter media is thermally bonded and incorporates a rigid polypropylene center core for increased durability. This thermal bonded micro-fiber construction offers no fiber release, consistent flow rate and superior filtration performance. It also produces a rigid cartridge that is less subject to collapse than any wound or pleated cartridge, yet is not brittle or prone to breakage problems common with resin bonded cartridges. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. Order a full case and save even more.
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    $17.99 Special Price $12.99 As low as $9.99
  12. TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading
    TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading - Easily Installs Inline Very Simple To Use
    TDS Water Meter - HM Digital DM1 - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Dual Range 0-9990 ppm. Always know if your RO membrane is performing correctly!
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    $49.99 Special Price $39.99 As low as $19.99
  13. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning - Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/ Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?
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    $5.99 Special Price $3.99 As low as $1.79
  14. Pro Products Sani System RO & Water Filtration System Sanitizer
    Pro Products Sani System RO & Water Filtration System Sanitizer
    Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Alos NSF certified. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Pro Products Sani System Sanitizer. 0.25 fl. oz. concentrate is perfect for your RO reverse osmosis drinking water system sanitizing..
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    $7.99 Special Price $4.99 As low as $2.99
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.