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$109.99
Out of Stock
$999.00
$116.14
$100.09
$1,399.99
$264.49
iSpring 4.5x10 in. 5 micron Big Blue Carbon Block (CTO) Water Filter Replacement Cartridge for Under Sink and Whole House Water Filtration Systems, Pack of 4 (FC15BX4)

Using quality coconut shell carbon and highly compact fabrication tech, this activated carbon block CTO(Chlorine, Taste, and Odor) filter cartridge is designed and produced to achieve filtration efficiency and long filter life for 10" Whole House and Undersink Water Filtration Systems. Free of surfactants, binders, and adhesives. No leaching carbon ash.

Knocks out cloudiness as well as bad tastes and odors, removes up to 99% of chlorine, and is effective on herbicides and industrial solvents and other contaminants like trihalomethanes. Steady flow and high absorption.

Each cartridge filters up to 50,000 gallons depending on the use and feed water quality. Replace the filter every 6 months or every 50,000 gallons of water for ideal performance, depending on the quality of source water and daily water consumption.

Fits standard 10"x4.5" filters. Official 2nd stage Carbon Block replacement filter cartridge for iSpring under sink water filter US21B and whole house water filtration system WGB21B; 1st stage for WGB21BM and WGB21B-PB. All 4 cartridges are individually sealed for freshness.

Your iSpring shopping experience is backed by a 30-day money-back guarantee, extended warranty upon registration, and lifetime tech support from iSpring in Atlanta, GA at (678) 261-7611.


$109.99
iSpring 400 Gallon High Capacity Under Under Sink Reverse Osmosis Drinking Water Filter System (RO400W1)
  • High capacity: 400 GPD. Premium RO membrane provides longer filter life than most RO membranes on the market.
  • With its 1st-stage 3-in-1 composite Sediment and Carbon Block filter and 2nd-stage advanced RO Membrane, RO400W1 effectively removes TDS, limescale, up to 99% of over 1,000 contaminants, including lead (removes up to 98%), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more. 3rd stage Carbon Block Filter further enhances the taste of the filtered water. Enjoy all the benefits of drinking clean and healthy water.
  • 2:1 Pure water to waste water ratio: More pure water generated than water water. Energy efficient and cost effective.
  • Sleek tankless design saves more under-sink space than traditional RO water filtration systems.
  • Dynamic LED display shows real-time filter usage status. Built-in TDS indicator helps you monitor water quality 24/7.
  • Thanks to its reinforced integrated water route design, leak-free DIY installation and filter change are greatly simplified, much easier, and truly time-saving.
  • Out of Stock
    $999.00
    iSpring 5-Stage 100GPD RO 2-Year Supply, Fits RCC100P (F15-100)
  • Filter pack especially for iSpring 5-stage RO systems, F15-100 #RCC100P series
  • 100 gpd reverse osmosis membrane, TDS rejection rate 90%-97%, tested by independent third-party to meet NSF/ANSI standard
  • 2-Year Supply of replacement filter for standard 5-stage RO system
  • Compatible to most RO systems, includes watts premier, flowmatic, puroline, Crystal Quest, APEC, and etc.
  • $116.14
    iSpring 5-Stage 75GPD Reverse Osmosis 2-Year Supply Filter Pack, Fits RCC7 RCC7P RCW7, white, 15 Piece (F15-75)
  • Tested by independent third-party to meet NSF/ANSI standard, replacement filters for 5-stage reverse osmosis systems
  • Standard sized 10" x 2.5"
  • Fits iSpring RCC7, RCC7P, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec
  • Includes 4x FP15 sediment filters, 4x FG15 GAC filters, 4x CTO carbon filters, 1x RO membrane, and 2x FT15 post carbon filters
  • Each filter is individually wrapped to preserve freshness and extend shelf life
  • $100.09
    iSpring CRO1000 4-Stage Tankless Commercial Reverse Osmosis Drinking Water Filtration System for Restaurant and Small Business, 1000 GPD RO Membrane, 20-Inch Big Blue Filters 3/4" NPT Inlet (CRO1000)
  • Commercial RO System with Reliable Features: CRO1000 is a true commercial-grade high output, 1,000 GPD, reverse osmosis water filtration system. Features a tankless design with high production of on-demand clean filtered water. Working water pressure ranges from 80 to 130 psi and 0.7 GPM output speed. Built-in water inlet and outlet gauges for easy pressure monitoring
  • High Efficiency RO Membrane: Removes up to 99% of over 1, 000 contaminants, including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more. This core of CRO1000 beats contaminants and provides you with clean water up to 1,000 gallons per day
  • 4-Stage Water Filtration: 1x 20" PP Sediment Filter with clear filter housing offers easy water quality and filter replacement monitoring, 2x 20" Carbon Block Filters, and an RO Membrane rated at 1,000 GPD in a stainless steel membrane housing
  • Easy Installation and Maintenance: Replace 1st stage filter every 3-6 months, 2nd stage and 3rd stage filters every 6-12 months, and replace RO membrane every 2-3 years. The filter replacement schedule depends on the source water quality. The freestanding metal frame on wheels with locking brakes for ease of movement
  • One RO System for All: Connect iSpring CRO1000 to your own choice of water dispenser system, drinking water faucet, icemaker, refrigerator, espresso coffee machine, hydroponics, and more. Not only a great choice for residential drinking water treatment, but also suitable for office and small businesses like restaurants, coffee shops, teashops, brewery, and clinics
  • $1,399.99
    iSpring F15-400 400 GPD Tankless RO System Replacement Filter Set, 2-Year Supply, fits RCS5T, 15 Piece, White (F15-400)
  • 2-year supply of replacement filters for iSpring 400GPD Commercial Tank less RO system
  • Individually wrapped, fresh from factory
  • 2 of UPGRADED 300GPD Commercial membranes included
  • $264.49
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