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Filter Cartridges - 946 - Extreame Savings! Save up to 47%


Extreame Savings! Up to 47% off on Filter Cartridges at In The National Interest. Top brands include Pentek, CA Ware, Sterling Seal & Supply, Inc. (STCC), KleenWater, Killer Filter, BestAir-Pro, BestAir Pro, & Abundant Flow Water. Hurry! Limited time offers. Offers valid only while supplies last.



Pentek R50-BB Pleated Polyester Filter Cartridge, 9-3/4'' x 4-1/2'', 50 Microns
Pentek R50-BB Pleated Polyester Filter Cartridge, 9-3/4" x 4-1/2", 50 Microns
By Pentek
SKU: #PENTEK-R50-BB
In Stock
$10.54
$8.99
You Save: 15%

sku: PENTEK-R50-BB, mpn: 155053-43, ean: 0163121152024,

This Pentek R50-BB pleated polyester filter cartridge reduces sand, dirt, silt, rust, and scale particles in residential and commercial water. It has a nominal filtration rating of 50 microns at an efficiency of 85%. The filter is made of resin-impre...


20'' x 4.5'', 1 Micron Carbon Block Filter Cartridge Big Blue BB Full Flow
20" x 4.5", 1 Micron Carbon Block Filter Cartridge Big Blue BB Full Flow
By CA Ware
In Stock
$39.95
$28.83
You Save: 28%

mpn: CBCB-20-1 FBA, ean: 3688881222819,

Features Class 1 Chlorine, Taste & Odor Reduction Made with Premium Quality Coconut Shell Activated Carbon Fits all Standard 20" Big Blue/Full Flow Filter Housings 18,000 Gallon capacity @ 1 PPM Chlorine Flow rate: 6 GPM Cartridges are individually s...


Sterling Seal KP-5251070884x2 Purolator Key Pleat Extended Surface Pleated Air Filter, Mechanical MERV 8, 14'' W x 25'' H x 1'' D (Pack of 2)
Sterling Seal KP-5251070884x2 Purolator Key Pleat Extended Surface Pleated Air Filter, Mechanical MERV 8, 14" W x 25" H x 1" D (Pack of 2)
By Sterling Seal & Supply, Inc. (STCC)
In Stock
$19.92

mpn: KP-5251070884x2,

Purolator Key Pleat Air Filter, supplied by Sterling Seal & Supply is a standard capacity pleated filter, available in 1", 2" or 4" depths and several standard face sizes to accommodate most system requirements. A seven-strap die cut is located on th...


String Wound Water Filter Cartridges, 2.5 x 20 Inch, 5 Micron - by KleenWater (6)
String Wound Water Filter Cartridges, 2.5 x 20 Inch, 5 Micron - by KleenWater (6)
By KleenWater
In Stock
$45.95

mpn: KW2520SW-5Micron-Qty6, ean: 0609053919484,

Six KleenWater brand string wound water sediment filter cartridges - 2.5 inch x 20 inch This replacement cartridge is an ideal choice for the value conscious consumer. Its performance is commensurate to the competition at a fraction of the cost . Pr...


Killer Filter Brand Replacement for Ingersoll Rand 32012957(Pack of 4)
Killer Filter Brand Replacement for Ingersoll Rand 32012957(Pack of 4)
By Killer Filter
In Stock
$25.21

mpn: 32012957,

Inlet Air Filter Replaces Ingersoll Rand 32012957.Replaces p/n 32012957. Guaranteed to meet or exceed original equipment manufacture specifications. Strict Quality Control for a superior product. ...


Killer Filter Replacement for MP FILTRI CS070P25A
Killer Filter Replacement for MP FILTRI CS070P25A
By Killer Filter
In Stock
$38.67

mpn: kf - CS070P25A,

CS070P25A MP FILTRI filter element replacementKiller Filter products put quality above the rest. Our USA made filters and parts use only the highest quality material available in the market and are manufactured to the highest standards.Each Filter is...


Pentek PCC212 Phosphate Filter Cartridge, 9-3/4'' x 2-5/8''
Pentek PCC212 Phosphate Filter Cartridge, 9-3/4" x 2-5/8"
By Pentek
In Stock
$28.66
$18.53
You Save: 35%

mpn: 155248-43, ean: 0051678248034,

This Pentek PCC212 phosphate filter cartridge inhibits scale and rust buildup and prevents the precipitation of dissolved rust in residential and commercial applications. It is made of sodium calcium hexametaphosphate crystal media in a polypropylene...


Sterling Seal P5MV8-20X25X5XCS P5-MV8 Purolator High End Filter, Replacement for Trion Air Bear, 20'' x 25'' x 5'' (Pack of 3)
Sterling Seal P5MV8-20X25X5XCS P5-MV8 Purolator High End Filter, Replacement for Trion Air Bear, 20" x 25" x 5" (Pack of 3)
By Sterling Seal & Supply, Inc. (STCC)
In Stock
$107.18

mpn: P5MV8-20X25X5XCS,

Purolator High End Filters supplied by Sterling Seal & Supply can effectively reduce pollen, dust, mold spores and pet dander Purolator High End Filters help reduce dust accumulation and allergy causing irritants and delivers up to 98% efficiency on ...


Sterling Seal FI-8222-SP1x2 Purolator Hi-E 40 Extended Surface Pleated Air Filter, Mechanical MERV 8, 18'' Width x 22'' Height x 2'' Diameter (Pack of 2)
Sterling Seal FI-8222-SP1x2 Purolator Hi-E 40 Extended Surface Pleated Air Filter, Mechanical MERV 8, 18" Width x 22" Height x 2" Diameter (Pack of 2)
By Sterling Seal & Supply, Inc. (STCC)
In Stock
$25.74

mpn: FI-8222-SP1x2,

Purolator Key Pleat Extended Surface Pleated Air Filter, Mechanical MERV 8. FI-8222-SP1x2Mechanical MERV8 Filter. Air Flow Capacity listed at 300FPM. Low initial resistance for energy savings, Quality Engineered, Consistently Produced, Made of 100% s...


Pentek WP10BB97P 10'' micro Wound Polypropylene Water Filter
Pentek WP10BB97P 10" micro Wound Polypropylene Water Filter
By Pentek
In Stock
$28.19
$14.99
You Save: 47%

mpn: 355215-43, ean: 0051678006078,

The Pentek WP10BB97P cartridge is 10 micron and designed for heavy duty uses when filtering out large sediment. This filter cartridge measures 4 1/2" in diameter and 10" in length.Fits Big Blue Polypropylene string wound filter systems. Filters are c...


Pentek ECP50-BB Pleated Cellulose Polyester Filter Cartridge, 9-3/4'' x 4-1/2'', 50 Microns
Pentek ECP50-BB Pleated Cellulose Polyester Filter Cartridge, 9-3/4" x 4-1/2", 50 Microns
By Pentek
In Stock
$15.62
$12.23
You Save: 22%

mpn: 255492-43, ean: 0051678492437,

This Pentek ECP50-BB pleated cellulose polyester filter cartridge reduces sand, dirt, silt, rust, and scale particles in residential and commercial water. It has a nominal filtration rating of 50 microns at an efficiency of 85%. The filter is made of...


Killer Filter Replacement for BALDWIN OB8722
Killer Filter Replacement for BALDWIN OB8722
By Killer Filter
In Stock
$77.94
$58.03
You Save: 26%

mpn: kf - OB8722,

OB8722 BALDWIN filter element replacementKiller Filter products put quality above the rest. Our USA made filters and parts use only the highest quality material available in the market and are manufactured to the highest standards.Each Filter is guar...


BestAir Pro 5-2025-11-2 Honeywell Merv 11 Media, 20'' x 25'' x 5'' (Pack of 2)
BestAir Pro 5-2025-11-2 Honeywell Merv 11 Media, 20" x 25" x 5" (Pack of 2)
By BestAir-Pro
In Stock
$130.69

mpn: 5-2025-11-2, ean: 0646847221170,

BestAir Pro 5-2025-11-2 Merv 11 2 Pack.Nominal Size: 20 x 25 x 5. Actual Size: 20 x 24⅝ x 4¼. Easy Installation. Captures harmful particles in air; collects dust, pollen, dust mites, mold & spores. Made in the U.S.A.. ...


BestAir Pro AB-52025-13-2 Merv 13 Residential Air Cleaner That Fits Air Bear, 20'' x 25'' x 5'' (Pack of 2)
BestAir Pro AB-52025-13-2 Merv 13 Residential Air Cleaner That Fits Air Bear, 20" x 25" x 5" (Pack of 2)
By BestAir Pro
In Stock
$59.64
$51.99
You Save: 13%

mpn: AB-52025-13-2,

Residential air cleaner Filter that fits: trion air BEAR models: Supreme 2000; 435790-027; 455602-019; 459200-005; scuttle model: db0-0025-020; general a I re model: Mac2000; source1 model: s1-mac10202505; ultravation model: 90-007; Braeburn model: 1...


Catalytic Carbon/KDF-85 20'' x 4.5'' (Big Blue) Cartridge Filter - GREAT FOR REMOVING HYDROGEN SULFIDE
Catalytic Carbon/KDF-85 20" x 4.5" (Big Blue) Cartridge Filter - GREAT FOR REMOVING HYDROGEN SULFIDE
By Abundant Flow Water
In Stock
$51.20

mpn: CC-4520-85, ean: 0783583354325,

ready to use 4 1/2 x 20 inch cartridge. sediment filter is in top of filter cartridge, you do not recieve a 2nd filter.Catalytic carbon/KDF-85 iron & sulfur filter, & radial flow carbon filter. Filters remove sand, chlorine, hydrogen sulfide, iron, h...


MAHLE OC21 Filter Replacement - pack of 4
MAHLE OC21 Filter Replacement - pack of 4
By Killer Filter
In Stock
$35.08

mpn: KF-OC21,

MAHLE OC21 Filter Replacement - pack of 4Killer Filter products put quality above the rest. Our USA made filters and parts use only the highest quality material available in the market and are manufactured to the highest standards. Each Filter is gu...


30294326 Ingersoll Rand Valve and Head Gasket Replacement
30294326 Ingersoll Rand Valve and Head Gasket Replacement
By Killer Filter
In Stock
$13.79

mpn: KF-30294326,

30294326 Ingersoll Rand Valve and Head Gasket ReplacementAll our products are manufactured to meet or exceed OEM specifications. Parts marked replacement or equivalent are to cross reference onlyManufactured with the Highest Quality Materials Availab...


Killer Filter Replacement for BECKER PUMP 74000501000 (Pack of 2)
Killer Filter Replacement for BECKER PUMP 74000501000 (Pack of 2)
By Killer Filter
In Stock
$42.34

mpn: KF - 74000501000,

74000501000 BECKER PUMP filter element replacement - pack of 2We guarantee the highest quality products available. Our replacement filters are guaranteed to meet or surpass all OEM specifications. All items marked Replacement or Equivalent are not af...


Killer Filter Replacement for VICKERS 228467 (Pack of 3)
Killer Filter Replacement for VICKERS 228467 (Pack of 3)
By Killer Filter
In Stock
$43.21

mpn: KF - 228467-A,

228467-A VICKERS filter element replacement - pack of 3We guarantee the highest quality products available. Our replacement filters are guaranteed to meet or surpass all OEM specifications. All items marked Replacement or Equivalent are not affiliate...


SCHROEDER M3 Filter Replacement - pack of 4
SCHROEDER M3 Filter Replacement - pack of 4
By Killer Filter
In Stock
$59.63

mpn: KF-M3,

SCHROEDER M3 Filter Replacement - pack of 4Killer Filter products put quality above the rest. Our USA made filters and parts use only the highest quality material available in the market and are manufactured to the highest standards. Each Filter is ...



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