Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

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Big Blue Water Filters ®

Big Blue Replacement Water Filters 10" & 20" Lengths X 4 1/2" Diameter

Big Blue is a designation for filters that are 4 1/2" in diameter.  They come in two standard lengths.  10" and 20".

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  1. Pro Products Sani System Sanitizer
    Pro Products Sani System Sanitizer
    Pro Products Sani System Sanitizer. 0.25 or 0.5 fl. oz. concentrate. 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. 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. Sani-System is now NSF certified! This is the best sanitizing solution available anywhere! Stock up and save. Learn More
    $7.99 Special Price $4.99 As low as $2.49
  2. TDS Meter - Test For Total Dissolved Solids In Water - Reverse Osmosis Membrane Tester - TDS Meter
    TDS Meter - Test For Total Dissolved Solids In Water - Reverse Osmosis Membrane Tester - TDS Meter
    TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed - The lower the TDS level in the water, the more efficiently your body's cells actually get hydrated by the water that you drink. The higher the TDS levels in the water, the greater the probability of harmful contaminants that can pose health risks or hinder the absorption of water molecules on the cellular level. Simple to use for Reverse Osmosis membrane monitoring. We really like this tester and think that anyone who wants to know about the quality of their water should have one of these TDS Meter Testers to monitor their RO membrane. Learn More
    $49.99 Special Price $37.99 As low as $17.99
  3. TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading
    TDS Meter Inline Tester- Dual Mode Reading - Easily Installs Inline - Very Simple To Use
    TDS Meter - 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. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. 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. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Always know if your RO membrane is performing correctly! Learn More
    $49.99 Special Price $39.99 As low as $19.99
  4. AquaPure AP810-2 by 3M Purification
    AquaPure AP810-2 by 3M Purification ® #55779-07 Large Diameter 5 Micron 20 Inch Long Sediment Filter
    AquaPure AP810-2 by 3M Purification ® #55779-07 aka Aqua-Pure or Aqua Pure - Large Diameter 5 Micron 20 Inch Long Sediment Filter. For Premium Performance Filtration. This AquaPure larger diameter dirt & rust cartridge is for larger homes and commercial applications. It is made from an exclusive process using pure white celluose fibers. As water passes from the outer surfaces into the center of the cartridge, the filtering pores become increasingly smaller to remove even microscopic particles. Unlike string-wound and pleated paper cartridges, the rigid, sturdy construction of the Aqua-Pure cartridges are able to withstand high pressure drop and stressful conditions such as water hammer. While it fits AquaPure Filter Housing AP802, it also fits other major brands. Learn More
    $59.99 Special Price $44.95 As low as $41.99
  5. AquaPure AP811-2 by 3M Purification ® #55779-09 Large Diameter 25 Micron 20 Inch Sediment Filter
    AquaPure AP811-2 by 3M Purification ® #55779-09 Large Diameter 25 Micron 20 Inch Sediment Filter
    AquaPure AP811-2 by 3M Purification ® #55779-09 aka Aqua-Pure or Aqua Pure - Large Diameter 25 Micron 20 Inch Sediment Filter. For Premium Performance Filtration - This Aqua-Pure larger diameter dirt & rust cartridge is for larger homes and commercial applications. It is made from an exclusive process using pure white celluose fibers. As water passes from the outer surfaces into the center of the cartridge, the filtering pores become increasingly smaller to remove even microscopic particles. Unlike string-wound and pleated paper cartridges, the rigid, sturdy construction of the Aqua-Pure cartridges are able to withstand high pressure drop and stressful conditions such as water hammer. While it fits Aqua-Pure Filter Housing AP802, it also fits other major brands. Cartridge Dimensions: 19 7/8" High x 4 5/8" Diameter - Graded Density For Long Life Hot & Cold Water (up to 100° F) Flow Rates up to 45 GPM - 25 Micron Nominal Medium Sediment Removal. Sold Individually. Learn More
    $97.70 Special Price $49.50 As low as $46.50
  6. 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?

    Dow 111 Silicone MSDS Safety Sheet

    Learn More
    $5.99 Special Price $3.99 As low as $1.79
  7. KX Matrikx ® PB1 Big Blue Carbon Block Water Filter # 06-425-200-975
    KX Matrikx ® PB1 Big Blue Carbon Block Water Filter # 06-425-200-975
    KX Matrikx ® PB1 # 06-425-200-975 .5 Micron Big Blue Extruded Carbon Block Water Filter. Lead, Cyst, Giardia and Crytosporidim Reduction. 9 3/4" long X 4 1/2" diameter . 9 per case, sold individually. Order a case and save even more. Learn More
    $69.99 Special Price $54.99 As low as $47.99
  8. KX Matrikx ® +1 Big Blue Carbon Block Water Filter # 01-425-125-975
    KX Matrikx ® +1 Big Blue Carbon Block Water Filter # 01-425-125-975
    KX Matrikx ® +1 # 01-425-125-975 .6 Micron Big Blue Extruded Carbon Block Water Filter. 9 3/4" long X 4 1/2" diameter . 9 per case, sold individually. Order a case and save even more. Learn More
    $47.99 Special Price $34.99 As low as $29.99
  9. KX Matrikx ® +CTO/2 Big Blue Carbon Block Water Filter # 03-425-125-975 & 32-425-125-975
    KX Matrikx ® +CTO/2 Big Blue Carbon Block Water Filter # 03-425-125-975 & 32-425-125-975
    KX Matrikx ® +CTO/2 # 03-425-125-975 & 32-425-125-975 5 Micron Big Blue Extruded Carbon Block Water Filter. 9 3/4" long X 4 1/2" diameter . 9 per case, sold individually. Order a case and save even more. Learn More
    $39.99 Special Price $29.99 As low as $25.99
  10. OMNIFILTER RS16 Sediment Whole House Heavy Duty Filter
    OMNIFILTER RS16 Sediment Whole House Heavy Duty Filter
    OMNIFILTER RS16 Sediment Whole House Heavy Duty Filters - Polyspun - 1 Micron. Reduces sediment, dirt, sand and rust particles.10 GPM (gallons per minute) - Change every 30,000 gallons or 6 months, whichever comes first. Learn More
    $27.99 Special Price $15.99 As low as $11.99
  11. Pentek ECP1-20BB # 255493 Big Blue Sediment Replacement Water Filter
    Pentek ECP1-20BB # 255493 Big Blue Sediment Replacement Water Filter
    Pentek ECP1-20BB # 255493 ECP1-20BB Big Blue Sediment Replacement Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" 1 Micron Pleated Cellulose-Polyester Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 255493 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. Learn More
    $39.99 Special Price $32.99 As low as $26.99
  12. Pentek ECP20-BB # 255491 Big Blue Replacement Sediment Water Filter
    Pentek ECP20-BB # 255491 Big Blue Replacement Sediment Water Filter
    Pentek ECP20-BB # 255491 ECP20BB Big Blue Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20 Micron Pleated Cellulose-Polyester Sediment Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek # 255491 Culligan CP-5BBS use as ECP5-BB (255490) 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. Learn More
    $19.99 Special Price $15.99 As low as $11.99
  13. Pentek ECP50-20BB # 255496 Big Blue Sediment Replacement Water Filter
    Pentek ECP50-20BB # 255496 Big Blue Sediment Replacement Water Filter
    Pentek ECP50-20BB # 255496 ECP50-20BB Big Blue Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" 50 Micron Pleated Cellulose-Polyester Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 255496 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. Learn More
    $37.99 Special Price $29.99 As low as $23.99
  14. Pentek OAC-20BB 155596 Oil Absorbing Repalcement Water Filter Cartridge
    Pentek OAC-20BB 155596 Oil Absorbing Repalcement Filter Cartridge
    Pentek 20" Big Blue OAC-20BB #155596 Oil Absorbing Repalcement Filter Cartridge Learn More
    $119.99 Special Price $99.99 As low as $87.99
  15. PENTEK - WP1BB20P #355222 - Polypropylene 1 Micron String Wound Replacement Sediment Water Filter- 1000
    Pentek WP1BB20P #355222 Polypropylene 1 micron String Wound Replacement Sediment Water Filter
    Pentek WP1BB20P #355222 Polypropylene 1 micron String Wound Sediment Replacement Water Filter. WP Series cartridges are manufactured from a durable polypropylene cord that is wound around a rigid polypropylene core. They are an economical solution to reduce fine sediment, including sand, silt, rust and scale particles. WP Series cartridges are wound in a precise pattern around the core providing greater surface area. The result is higher dirt-loading capacity and greater efficiency than standard wound cartridges like the CW. These string-wound cartridge styles are capable of withstanding temperatures up to 165ºF (73.9ºC), and will accommodate flow rates between 7 and 10 GPM with minimal pressure drop. WP Series cartridges are suitable for a wide variety of sediment filtration applications, including municipal and well water as well as many industrial fluids. This is a very high quality sediment filter. Learn More
    $57.99 Special Price $44.99 As low as $39.99
  16. PENTEK- WP25BB20P- Polypropylene 25 Micron String-Wound Sediment Replacement Water Filter-1000
    Pentek WP25BB20P #355225 Polypropylene 25 Micron String Wound Sediment Replacement Water Filter
    Pentek WP25BB20P #355225 Polypropylene 25 micron String Wound Sediment Water Filter. WP Series cartridges are manufactured from a durable polypropylene cord that is wound around a rigid polypropylene core. They are an economical solution to reduce fine sediment, including sand, silt, rust and scale particles. WP Series cartridges are wound in a precise pattern around the core providing greater surface area. The result is higher dirt-loading capacity and greater efficiency than standard wound cartridges like the CW. These string-wound cartridge styles are capable of withstanding temperatures up to 165ºF (73.9ºC), and will accommodate flow rates between 7 and 10 GPM with minimal pressure drop. WP Series cartridges are suitable for a wide variety of sediment filtration applications, including municipal and well water as well as many industrial fluids. This is a very high quality sediment filter. Learn More
    $52.99 Special Price $39.99 As low as $34.99
  17. PENTEK- WP5BB20P - Polypropylene 5 Micron String-Wound Sediment Replacement Water Filter- #355223- 1000
    Pentek WP5BB20P #355223 Polypropylene 5 micron String Wound Sediment Replacement Water Filter
    Pentek WP5BB20P #355223 Polypropylene 5 micron String Wound Sediment Water Filter. WP Series cartridges are manufactured from a durable polypropylene cord that is wound around a rigid polypropylene core. They are an economical solution to reduce fine sediment, including sand, silt, rust and scale particles. WP Series cartridges are wound in a precise pattern around the core providing greater surface area. The result is higher dirt-loading capacity and greater efficiency than standard wound cartridges like the CW. These string-wound cartridge styles are capable of withstanding temperatures up to 165ºF (73.9ºC), and will accommodate flow rates between 7 and 10 GPM with minimal pressure drop. WP Series cartridges are suitable for a wide variety of sediment filtration applications, including municipal and well water as well as many industrial fluids. This is a very high quality sediment filter. Learn More
    $54.99 Special Price $41.99 As low as $36.99
  18. FSI 5 Micron 10 Inch Big Blue Whole House Replacement Sediment Pre Filter
    FSI 5 Micron 10 Inch Big Blue Sediment Pre Filter
    FSI 5 Micron 10 Inch Big Blue Sediment Pre Filter. CMMF059875-45W1 - spun polypropylene Learn More
    $23.99 Special Price $14.99 As low as $11.99
  19. Pentek C1-20BB # 155651 C1-20BB Taste & Odor Replacement Water Filter
    Pentek C1-20BB # 155651 C1-20BB Taste & Odor Replacement Water Filter
    Pentek C1-20BB # 155651 C1-20BB Taste & Odor Replacement Water Filter. Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner / Many Other Brands C1-20BB Taste & Odor Water Filter. C1-20BB Carbon-Impregnated Cellulose 5 Micron Taste & Odor Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155651 C Series cartridges offer an economical solution for all your general-purpose water filtration needs. Constructed of a carbon impregnated cellulose media, these dual-purpose cartridges filter out fine sediment particles and reduce unwanted taste, odor and chlorine from your tap water. A polyester reinforcement backing and external netting provide additional strength and dirt-loading capacity. These dual-purpose cartridges are well suited for a wide range of residential applications, and make excellent polishing filters when used in process or closed-loop streams. Order a case and save even more. Learn More
    $47.99 Special Price $37.99 As low as $32.99
  20. Pentek CBC-20BB # 155312 CBC20BB 20 Inch Big Blue Replacement Carbon Block Water Filter
    Pentek CBC-20BB # 155312 CBC20BB 20 Inch Big Blue Replacement Carbon Block Water Filter
    Pentek CBC-20BB # 155312 CBC20BB 20 Inch Big Blue Replacement Carbon Block Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue Half Micron Carbon Briquette Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155312 CBC Series cartridges are highly effective at reducing unwanted taste, odor, chlorine, certain VOC's and pesticides from potable drinking water. With a nominal 0.5-micron rating, they are equally effective at reducing Cryptosporidium and Giardia cysts, as well as fine sediment. They also make excellent polishing filters or pre-filters in applications requiring fine filtration and high capacity. This is an excellent prefilter. Order a case and save even more. Learn More
    $99.99 Special Price $85.99 As low as $69.99
  21. Pentek ECP5-20BB # 255494 Replaces #155428 CP520BB Big Blue Sediment Replacement Water Filter
    Pentek ECP5-20BB # 255494 Replaces #155428 CP520BB Big Blue Sediment Replacement Water Filter
    Pentek ECP5-20BB # 255494 Replaces #155428 CP520BB Big Blue Sediment Replacement Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" 5 Micron Pleated Cellulose-Polyester Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155428 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. Learn More
    $34.99 Special Price $26.99 As low as $18.99
  22. Pentek DGD-2501-20 # 155360 20 Inch Big Blue 1 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-2501-20 # 155360 20 Inch Big Blue 1 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-2501-20 # 155360 20 Inch Big Blue 1 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" Dual Gradient 1 Micron Polypropylene Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155360 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more. Learn More
    $38.99 Special Price $29.99 As low as $24.99
  23. Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" Dual Gradient 5 Micron Polypropylene Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155358 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more. Learn More
    $38.99 Special Price $29.99 As low as $23.99
  24. Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 20 Big Blue 20" 25 Micron Dual Gradient Polypropylene Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek #155356 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more. Learn More
    $38.99 Special Price $29.99 As low as $23.99
  25. Pentek EP-20BB # 155583 EP20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EP-20BB # 155583 EP20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EP-20BB # 155583 EP20BB Big Blue Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 5 Micron Carbon Block Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155583 EP Series cartridges are versatile and combine the long life of carbon block filtration with the higher dirt-loading tolerance of wound, carbon-impregnated paper cartridges like our C-1. EP Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 5-micron filtration rating, high porosity and greater chlorine removal capacity. The high porosity design helps prevent the cartridge from plugging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. Order a case and save even more. Learn More
    $63.99 Special Price $49.99 As low as $39.99
  26. Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 10 Micron Carbon Block Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155783 EPM Series cartridges are a modified version of our "EP Series" cartridge. An economical price makes this cartridge suitable for taste, odor and chlorine reduction, as well as sediment filtration. EPM Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 10 micron filtration rating, high porosity and greater chlorine removal capacity. The high porosity design helps prevent the cartridge from plugging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. Order a case and save even more. Learn More
    $53.99 Special Price $42.99 As low as $36.99
  27. Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue Granular Activated Carbon Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155249 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. The construction of the cartridge allows water to enter at one end and pass through the entire length of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20 micron post filter helps remove carbon fines and other suspended particles from the filtered water. Order a case and save even more. Learn More
    $67.99 Special Price $44.99 As low as $34.99
  28. Pentek NCP-20BB # 155382 NCP20BB Big Blue GAC Carbon Taste & Odor Water Filter Cartridge
    Pentek NCP-20BB # 155382 NCP20BB Big Blue GAC Carbon Taste & Odor Water Filter Cartridge
    Pentek NCP-20BB # 155382 NCP20BB Big Blue GAC Carbon Taste & Odor Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Big Blue 10 Micron Pleated Carbon Impregnated Polyester Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155382 NCP Series cartridges are constructed from a carbon impregnated non-cellulose media. They offer sediment filtration, as well as taste, odor and chlorine reduction all in one cartridge. Unlike cellulose cartridges, NCP Series cartridges are resistant to both bacterial attack and biofilm buildup allowing them to be used for municipal and non-chlorinated water applications. Pleats provide additional surface area for high dirt loading capacity, while maintaining minimal pressure drop. This combination of pleated polyester media and carbon filtration produces and outstanding filter cartridge with extended service life. NCP Series Big Blue water filter cartridges are excellent polishing filters, and are ideal for whole house and well water applications. Order a case and save even more. Learn More
    $49.99 Special Price $39.99 As low as $34.99
  29. Pentek PCF1-20MB # 155274 PCF1 20MB DI Deionization Replacement Water Filter Cartridge
    Pentek PCF1-20MB # 155274 PCF1 20MB Deionization Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek PCF1-20MB # 155274 PCF1 20MB Deionization Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Deionization Water Filter. FDA D.I. Resin. 20" long X 2 7/8" diameter. 6 per case, sold individually. Ametek # 155274 PCF Series cartridges have been developed in response to the requirements for deionized water in many industries. They are manufactured using an FDA-compliant resin that has been subjected to additional post-production steps to minimize the total organic carbon (TOC) level. This high capacity, semi-conductor-grade resin cartridges are ideal for use in pharmaceutical and medical laboratories, cosmetics and circuit board printing applications. Order a case and save even more. Learn More
    $63.99 Special Price $49.99 As low as $42.99
  30. Pentek R30-20BB # 155430 R-30-20BB Big Blue Pleated Sediment Replacement Water Filter Cartridge
    Pentek R30-20BB # 155430 R-30-20BB Big Blue Pleated Sediment Replacement Water Filter Cartridge
    Pentek R30-20BB # 155430 R-30-20BB Big Blue Pleated Sediment Replacement Water Filter Cartridge Compatible With Culligan, Ametek, US Filter, Plymouth, Kleen Plus, American Plumber, Bruner & Many Other Brands. Big Blue 20" 30 Micron Reusable Polyester Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155430 R Series cartridges are manufactured from a durable, non-woven and reusable polyester fabric that is suitable for a wide range of filtration uses. The media is pleated to maximize dirt holding capacity and extend the time period between changes or cleaning. R Series cartridges are resistant to both bacteria and chemical attack making them suitable for a variety of residential, commercial and industrial applications. Order a case and save even more. Learn More
    $47.99 Special Price $37.99 As low as $31.99
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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.