Best Pentek Deals of Oct 2026
Updated October 29, 2026Our site contains affiliate links for which we may be compensated.
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CLEANER, BETTER-TASTING WATER - Reduces chlorine taste and odor throughout your entire home so every tap delivers fresher-tasting water, using a deep bed of granular activated carbon (GAC).
RADIAL FLOW CARBON DESIGN - Water flows radially through the carbon bed for a low pressure drop of just 0.90 psi at 4 gpm, while the design reduces the carbon fines commonly released by standard GAC cartridges.
HIGH-CAPACITY WHOLE-HOUSE FILTRATION - Rated for more than 100,000 gallons of chlorine taste and odor reduction at 4 gpm, delivering up to about a year of whole-house service between changes.
FITS ALL 20-INCH BIG BLUE HOUSINGS - Measures 20" x 4.5" and drops into any 20" Big Blue or other heavy-duty housing, replacing any 20" x 4.5" carbon cartridge. Ideal for point-of-entry and high-flow systems.
THREE-STAGE WHOLE HOUSE FILTRATION - Three 20-inch Big Blue housings plumbed in series let you build a multi-stage setup, such as sediment, then carbon, then a final polish, for cleaner water throughout your home.
SHIPS FULLY PRE-ASSEMBLED - Arrives mounted in series on a wall bracket with hardware included, saving valuable installation time and space, and connects through 1-inch NPT ports for high-flow whole house service.
HIGH-CAPACITY, HIGH-FLOW DESIGN - Handles flow rates up to 40 gpm at a maximum 90 psi, and each housing holds any 20" x 4.5" cartridge for long service intervals between changes.
PRESSURE RELIEF FOR EASY SERVICE - A built-in pressure relief button relieves housing pressure during cartridge changes; durable polypropylene housings offer excellent chemical resistance for residential, commercial, and industrial use.
IMPROVES WATER TASTE - Reduces up to 3 ppm of dissolved iron to cut the metallic taste it causes, for cleaner, better-tasting water from well or municipal supplies throughout your home.
HELPS REDUCE RUST STAINING - Helps clear the orange and brown staining that iron leaves on sinks, toilets, tubs and fixtures, and lowers the chance of iron damage to pipes and water heaters.
RADIAL FLOW IRON REDUCTION - Designed for the 20-inch Big Blue housing and installed on the main cold-water line after the pressure tank or meter. For best results, pair with a sediment pre-filter and a carbon post-filter.
FITS ALL 20-INCH BIG BLUE HOUSINGS - Measures 20" x 4.5" and drops into any 20" Big Blue or other heavy-duty housing, replacing any 20" x 4.5" iron reduction cartridge. Adds no harmful chemicals and is safe for drinking water.
KEEP YOUR WATER CLEANER - Reduces dirt, sand, silt, rust and other sediment to help protect your appliances, plumbing and downstream filters. Made from 100% pure polypropylene, it will not impart taste, odor or color to your water.
IDEAL HIGH-FLOW PRE-FILTER - Dual-gradient density construction increases filter density from the outer surface to the core, delivering up to 3X the dirt-holding capacity of similar-size sediment cartridges and 233% greater effective filter depth.
TESTED AND CERTIFIED TO NSF/ANSI 42 - Independently tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements. Manufactured from 100% pure polypropylene for purity and broad chemical compatibility.
FITS ALL 10-INCH BIG BLUE HOUSINGS - Drops into any 10" Big Blue or other heavy-duty housing and replaces any 10" x 4.5" sediment cartridge, with a low pressure drop under 1 psi at 10 gpm for strong whole-house flow.
BUILT FOR HIGH-FLOW WHOLE-HOUSE FILTRATION - This extra-large 20-inch Big Blue housing delivers heavy-duty, high-capacity filtration for sediment- and chlorine-heavy water, with a low 1 psi pressure drop at 15 gpm through 1" NPT ports.
FITS ALL 20-INCH BIG BLUE CARTRIDGES - Accepts any 20" x 4.5" heavy-duty cartridge, whether sediment, carbon block, GAC, or specialty, so you can tailor filtration to your water. Filter cartridge sold separately.
NSF-CERTIFIED CONSTRUCTION - The polypropylene sump and High-Flow Polypropylene (HFPP) cap are tested and certified by NSF International to NSF/ANSI Standard 42 for material and structural integrity; includes EPDM O-ring and stainless relief button.
DOES NOT INCLUDE WRENCH OR BRACKET - Ships with the sump, cap, and O-ring only; the mounting bracket, screws, and SW-4 housing wrench are sold separately, as is the filter cartridge. Confirm your plumbing is 1" NPT before ordering.
KEEP YOUR WATER CLEANER - Reduces fine dirt, sand, silt, rust, and sediment down to 1 micron throughout your whole house; the 100% pure polypropylene media will not impart taste, odor, or color to your water.
IDEAL HIGH-FLOW PRE-FILTER - Dual-gradient density construction grows denser from the outer wall toward the core, delivering up to 3 times the dirt-holding capacity of similar-size sediment cartridges for longer service life.
TESTED AND CERTIFIED BY NSF - Manufactured from 100% pure polypropylene and tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements, at a fine 1 micron nominal rating.
SIZED FOR 10-INCH BIG BLUE HOUSINGS - Drops into any 10" x 4.5" Big Blue or heavy duty whole house housing and replaces most 10-inch sediment cartridges, with a low pressure drop under 1 psi at 10 gpm.
DUAL-PURPOSE SEDIMENT AND CHLORINE FILTRATION - Combines sediment reduction with chlorine taste and odor reduction in a single 10-micron cartridge, reducing the number of filters in your system while delivering cleaner, fresher water
NON-CELLULOSE MEDIA FOR ANY WATER SOURCE - Carbon-impregnated polyester construction works with both municipal and non-chlorinated water, unlike cellulose filters that break down without chlorinated supply; ideal for well water and post-RO polishing
PLEATED DESIGN FOR HIGH DIRT LOADING - Pleated media provides expanded surface area for high dirt-holding capacity with only 2 psi pressure drop at 8 gpm, extending service life and maintaining consistent flow throughout use
FITS ALL 10 INCH BIG BLUE HOUSINGS - Drop-in 4.50" x 9.75" cartridge with polypropylene endcaps and core fits any 10" Big Blue or heavy-duty housing; replaces any standard 10" x 4.5" carbon filter cartridge
1" NPT INLET AND OUTLET PORTS — confirm your existing plumbing is 1" NPT before ordering. This housing does NOT fit 3/4" NPT or 1-1/2" NPT systems (those are sold under different ASINs). High-Flow Polypropylene (HFPP) cap with pressure relief button
FITS ALL 10" BIG BLUE CARTRIDGES (10" x 4.5" heavy duty) — sediment, carbon block, or specialty filters from Pentair and most major brands. FILTER CARTRIDGE SOLD SEPARATELY
DOES NOT INCLUDE mounting bracket, mounting screws, or housing wrench — all sold separately. Brackets are NOT interchangeable with standard 10" x 2.5" brackets (Big Blue bolt pattern is 3" x 3", 4" center to bend)
LEAK PREVENTION — tighten sump to hand-tight plus 1/4 to 1/2 turn (do not over-tighten).
CLEANER, BETTER-TASTING WATER - Reduces bad taste and odor plus chlorine taste and odor across your whole home, using a bonded powdered activated carbon (PAC) block for noticeably fresher water.
CARBON BLOCK PLUS PRE-FILTER - A polyolefin bilaminate outer wrap traps sediment to extend cartridge life, while the high-porosity design uses more of the carbon at a low pressure drop of 2.0 psi at 4 gpm.
NSF/ANSI 42 CERTIFIED - The EP-20BB is tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements, with a nominal 5 micron rating based on 85% or greater particle removal.
FITS ALL 20-INCH BIG BLUE HOUSINGS - Measures 20" x 4.5" and drops into any 20" Big Blue or other heavy-duty housing, replacing any 20" x 4.5" carbon cartridge for whole-house and light commercial use.
10 Pentek deals are available from: Amazon, starting from $36.12.
The lowest price we found is $36.12 while the highest is $363.95. Prices for the best Pentek deals average at $113.48.
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