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Chloramine Reduction Filters

  • Vita Filters CTO 10" Carbon Block Filter (9-3/4") Drop-In Compatible with 32-250-10-MATRIKX

    Original price $16.99 - Original price $16.99
    Original price
    $16.99
    $16.99 - $16.99
    Current price $16.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $16.99 - Original price $16.99
    Original price
    $16.99
    $16.99 - $16.99
    Current price $16.99
  • OptiPure 300-05828 CTO-Q10 10" Filter Cartridge 1.5 GPM 0.5 Micron

    Original price $80.79 - Original price $80.79
    Original price
    $80.79
    $80.79 - $80.79
    Current price $80.79

    The Pentair OptiPure CTO-Q10 is a 10” Qwik-Twist cartridge for use in OptiPure QT10 Series Systems to reduce sediment down to 0.5-microns and reduc...

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    Original price $80.79 - Original price $80.79
    Original price
    $80.79
    $80.79 - $80.79
    Current price $80.79
  • OptiPure 300-05832 CTOS-QCR 15" Scale & Chloramine Reduction Cartridge 0.5 GPM

    Original price $115.57 - Original price $115.57
    Original price
    $115.57
    $115.57 - $115.57
    Current price $115.57

    The OptiPure 300-05832 CTOS-QCR is a 15” Qwik-Twist cartridge that reduces chloramines to 6,000 gallons at a flow rate of 0.5 GPM. The cartridge in...

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    Original price $115.57 - Original price $115.57
    Original price
    $115.57
    $115.57 - $115.57
    Current price $115.57
  • OptiPure 170-52081 QTI1+CR Replacement Cartridge Kit (CTO-Q10, CTOS-QCR)

    Original price $176.43 - Original price $176.43
    Original price
    $176.43
    $176.43 - $176.43
    Current price $176.43

    The CTO-Q10 is a 10” Qwik-Twist cartridge that reduces sediment down to 0.5 microns and reduces chlorine, taste & odor at a flow rate of 1.5 GP...

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    Original price $176.43 - Original price $176.43
    Original price
    $176.43
    $176.43 - $176.43
    Current price $176.43
  • Everpure DEV9830-01 HQS-WF Filter Cartridge

    Original price $52.91 - Original price $52.91
    Original price
    $52.91
    $52.91 - $52.91
    Current price $52.91

    Application: Produces perfect water for premium drinking water applications. Fits Everpure QL1 and QL3b heads. Part of a sanitary quick-change fil...

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    Original price $52.91 - Original price $52.91
    Original price
    $52.91
    $52.91 - $52.91
    Current price $52.91
  • OptiPure 300-05821 CTO-Q10CR 10” Chloramine Reduction Cartridge 0.5 GPM

    Original price $93.21 - Original price $93.21
    Original price
    $93.21
    $93.21 - $93.21
    Current price $93.21

    The Optipure CTO-Q10CR is a 10” Qwik-Twist cartridge that reduces chloramines up to 4,000 gallons at a flow rate of 0.5 GPM. Applications: Applica...

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    Original price $93.21 - Original price $93.21
    Original price
    $93.21
    $93.21 - $93.21
    Current price $93.21
  • Everpure 300-05828 CTO-Q10 10" Filter Cartridge 1.5 GPM 0.5 Micron

    Original price $80.79 - Original price $80.79
    Original price
    $80.79
    $80.79 - $80.79
    Current price $80.79

    Supply clean, safe water to your commercial beverage equipment with this Everpure 300-05828 CTO-Q10 filter cartridge. This cartridge directly repla...

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    Original price $80.79 - Original price $80.79
    Original price
    $80.79
    $80.79 - $80.79
    Current price $80.79
  • Matrikx 32-250-10-MATRIKX CTO 10" Carbon Block Filter (9-3/4")

    Original price $18.99 - Original price $18.99
    Original price
    $18.99
    $18.99 - $18.99
    Current price $18.99

    Replacement here: Vita Filters 10" (9-3/4") Carbon Block Filter Drop-in  Why shop with Vita Filters? Authorized Matrikx Distributor Free Shipping ...

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    Original price $18.99 - Original price $18.99
    Original price
    $18.99
    $18.99 - $18.99
    Current price $18.99
  • Everpure DEV9830-01 HQS-WF Filter Cartridge 3-Pack

    Original price $129.90 - Original price $129.90
    Original price
    $129.90
    $129.90 - $129.90
    Current price $129.90

    Application: Produces perfect water for premium drinking water applications. Fits Everpure QL1 and QL3b heads. Part of a sanitary quick-change fil...

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    Original price $129.90 - Original price $129.90
    Original price
    $129.90
    $129.90 - $129.90
    Current price $129.90
  • Everpure 7CB5 EV9618-11 Filter Cartridge (Fountain & Vending)

    Original price $104.04 - Original price $104.04
    Original price
    $104.04
    $104.04 - $104.04
    Current price $104.04

    The Everpure 7CB5 Filter Cartridge is a carbon block filter that finely polishes water for high-quality beverage and food applications. Everpure 7C...

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    Original price $104.04 - Original price $104.04
    Original price
    $104.04
    $104.04 - $104.04
    Current price $104.04
  • OptiPure 300-05828 CTO-Q10 10" Filter Cartridge 2-Pack

    Original price $161.58 - Original price $161.58
    Original price
    $161.58
    $161.58 - $161.58
    Current price $161.58

    The Pentair OptiPure CTO-Q10 is a 10” Qwik-Twist cartridge for use in OptiPure QT10 Series Systems to reduce sediment down to 0.5-microns and reduc...

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    Original price $161.58 - Original price $161.58
    Original price
    $161.58
    $161.58 - $161.58
    Current price $161.58
  • Everpure 4FC-L EV9693-10 Filter Cartridge

    Original price $95.77 - Original price $95.77
    Original price
    $95.77
    $95.77 - $95.77
    Current price $95.77

    With high capacity, the extended-life filter offers submicron particulate reduction, lead, cyst, chlorine taste & odor protection, and more. Th...

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    Original price $95.77 - Original price $95.77
    Original price
    $95.77
    $95.77 - $95.77
    Current price $95.77
  • Omnipure DFKE 10" Dual Espresso Filtration System (Softening)

    Original price $46.99 - Original price $129.99
    Original price
    $46.99 - $129.99
    $46.99 - $129.99
    Current price $46.99

    Espresso/Cappuccino Machine Applications For machine protection and taste, odor, chlorine reduction For Chlorine, Taste, Odor reduction Reduces sa...

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    Original price $46.99 - Original price $129.99
    Original price
    $46.99 - $129.99
    $46.99 - $129.99
    Current price $46.99
  • Everpure 7F EV9654-10 Filter Cartridge Post Filter

    Original price $192.82 - Original price $192.82
    Original price
    $192.82
    $192.82 - $192.82
    Current price $192.82

    Post-treatment cartridge for use in RO applications. Applications: Special application cartridge for use with RO systems For exclusive use as post...

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    Original price $192.82 - Original price $192.82
    Original price
    $192.82
    $192.82 - $192.82
    Current price $192.82
  • OptiPure BWS175 RO Replacement Cartridge Kit (CTO-Q10, AMS-QT15, ILMA-10.14)

    Original price $485.43 - Original price $485.43
    Original price
    $485.43
    $485.43 - $485.43
    Current price $485.43

    Replacement cartridges for OptiPure BWS175 Reverse Osmosis RO Systems. Kit includes one (1) of each of the following: CTO-Q10 300-05828 10" Filter...

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    Original price $485.43 - Original price $485.43
    Original price
    $485.43
    $485.43 - $485.43
    Current price $485.43
  • OptiPure 170-52081 QTI1+CR Scale & Chloramine Reduction Filtration System 2.5 GPM 0.5 Micron (Steam)

    Original price $368.80 - Original price $368.80
    Original price
    $368.80
    $368.80 - $368.80
    Current price $368.80

    The QTI1+CR is a dual-cartridge water treatment system with two Qwik-Twist cartridges, which reduces sediment over 0.5 microns and reduces chlorine...

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    Original price $368.80 - Original price $368.80
    Original price
    $368.80
    $368.80 - $368.80
    Current price $368.80
  • Everpure 7SO EV9607-04 Softening Filter Cartridge (Espresso)

    Original price $131.66 - Original price $131.66
    Original price
    $131.66
    $131.66 - $131.66
    Current price $131.66

    The Everpure EV970704 Softening Cartridge is designed to reduce hardness in water that can cause minerals to build up in coffee and espresso equipm...

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    Original price $131.66 - Original price $131.66
    Original price
    $131.66
    $131.66 - $131.66
    Current price $131.66
  • Everpure EV9970-42 Triple-MC2 Cartridge Kit

    Original price $336.12 - Original price $336.12
    Original price
    $336.12
    $336.12 - $336.12
    Current price $336.12

    Convenient replacement cartridge kit for Everpure High Flow CSR Triple-MC² Systems contains all necessary cartridges to service filters in specific...

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    Original price $336.12 - Original price $336.12
    Original price
    $336.12
    $336.12 - $336.12
    Current price $336.12
  • Everpure EV9781-12 EFS8002-S Filter Cartridge for Cuno 8000 Series

    Original price $81.09 - Original price $81.09
    Original price
    $81.09
    $81.09 - $81.09
    Current price $81.09

    Applications: Food & Beverage and Commercial-Industrial Convenient drop-in design fits most 20" filter bowls Carbon block with 5-micron ratin...

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    Original price $81.09 - Original price $81.09
    Original price
    $81.09
    $81.09 - $81.09
    Current price $81.09
  • Everpure 7CB5-S EV9618-26 Filter Cartridge (Ice)

    Original price $111.38 - Original price $111.38
    Original price
    $111.38
    $111.38 - $111.38
    Current price $111.38

    The Everpure 7CB5-S filter reduces chlorine taste and odor and other offensive contaminants in your water. The 7CB5-S also contains a scale inhibit...

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    Original price $111.38 - Original price $111.38
    Original price
    $111.38
    $111.38 - $111.38
    Current price $111.38
  • Everpure EV9771-00 7CLM+ Filter Cartridge

    Original price $164.02 - Original price $164.02
    Original price
    $164.02
    $164.02 - $164.02
    Current price $164.02

    The Everpure 7CLM+ Cartridge is a high-capacity chloramine reduction solution that delivers premium drinking water for fountain beverage applicatio...

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    Original price $164.02 - Original price $164.02
    Original price
    $164.02
    $164.02 - $164.02
    Current price $164.02
  • Vita Filters Easy Install Dual Drinking Water Filtration System

    Original price $29.99 - Original price $129.99
    Original price
    $29.99 - $129.99
    $29.99 - $129.99
    Current price $29.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $29.99 - Original price $129.99
    Original price
    $29.99 - $129.99
    $29.99 - $129.99
    Current price $29.99
  • Everpure EV9977-00 CONSERV 75E Reverse Osmosis System (Espresso)

    Original price $0.00 - Original price $0.00
    Original price $0.00
    $1,551.60
    $1,551.60 - $1,551.60
    Current price $1,551.60

    Designed for heavy-duty applications, this RO System combines true corrosion and scale protection in one solution. The compact system combines a ca...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $1,551.60
    $1,551.60 - $1,551.60
    Current price $1,551.60
  • Everpure EV9691-76 2FC-S Cartridge

    Original price $77.62 - Original price $77.62
    Original price
    $77.62
    $77.62 - $77.62
    Current price $77.62

    Everpure 2FC-S Filter Cartridge is designed for food service applications, reduces sediment, CTO, and cysts, and inhibits limescale build-up. The E...

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    Original price $77.62 - Original price $77.62
    Original price
    $77.62
    $77.62 - $77.62
    Current price $77.62
  • Vita Filters Easy Install Water Softening & Filtration System

    Original price $46.99 - Original price $129.99
    Original price
    $46.99 - $129.99
    $46.99 - $129.99
    Current price $46.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $46.99 - Original price $129.99
    Original price
    $46.99 - $129.99
    $46.99 - $129.99
    Current price $46.99
  • OptiPure BWS100 RO Replacement Cartridge Kit (CTO-Q10, AMS-QT10)

    Original price $376.34 - Original price $376.34
    Original price
    $376.34
    $376.34 - $376.34
    Current price $376.34

    The OptiPure BWS100 is a Blended Water System that utilizes Reverse Osmosis (RO) to remove >97% of the Total Dissolved Solids (TDS) from water w...

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    Original price $376.34 - Original price $376.34
    Original price
    $376.34
    $376.34 - $376.34
    Current price $376.34
  • OptiPure 300-05833 CTO-QCR2 15" Chloramine Reduction Cartridge 1.7 GPM

    Original price $130.78 - Original price $130.78
    Original price
    $130.78
    $130.78 - $130.78
    Current price $130.78

    The Optipure CTO-QCR2 is a 15” Qwik-Twist cartridge that reduces chloramines up to 10,000 gallons at a flow rate of 1.7 gpm Applications: Applica...

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    Original price $130.78 - Original price $130.78
    Original price
    $130.78
    $130.78 - $130.78
    Current price $130.78
  • Everpure EV9601-12 AC Filter Cartridge

    Original price $54.06 - Original price $54.06
    Original price
    $54.06
    $54.06 - $54.06
    Current price $54.06

    The Everpure AC EV9601-12 Filter finely polishes treated water to premium quality for drinking and cooking water applications. This cartridge utili...

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    Original price $54.06 - Original price $54.06
    Original price
    $54.06
    $54.06 - $54.06
    Current price $54.06
  • OptiPure 300-05831 CTO-QCR 15" Chloramine Reduction Cartridge 0.5 GPM 5 Micron

    Original price $95.64 - Original price $95.64
    Original price
    $95.64
    $95.64 - $95.64
    Current price $95.64

    The CTO-QCR is a 15” Qwik-Twist cartridge that reduces chloramine for up to 6,000 gallons at a flow rate of 0.5 GPM. Applications: Applications r...

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    Original price $95.64 - Original price $95.64
    Original price
    $95.64
    $95.64 - $95.64
    Current price $95.64
  • OptiPure 170-52080 QT1+CR Dual Chloramine Reduction Filtration System 2.5 GPM (Steam)

    Original price $352.80 - Original price $352.80
    Original price
    $352.80
    $352.80 - $352.80
    Current price $352.80

    The Pentair OptiPure QT1+CR, 170-52081 170-52080, is a dual-cartridge water treatment system with two Qwik-Twist cartridges, which reduces sediment...

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    Original price $352.80 - Original price $352.80
    Original price
    $352.80
    $352.80 - $352.80
    Current price $352.80
  • Vita Filters Easy Install Water Filtration System

    Original price $16.99 - Original price $99.99
    Original price
    $16.99 - $99.99
    $16.99 - $99.99
    Current price $16.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $16.99 - Original price $99.99
    Original price
    $16.99 - $99.99
    $16.99 - $99.99
    Current price $16.99
  • Everpure 300-05831 CTO-QCR 15" Filter Cartridge Chloramine Reduction

    Original price $95.64 - Original price $95.64
    Original price
    $95.64
    $95.64 - $95.64
    Current price $95.64

    Supply clean, safe water to your commercial equipment with this Everpure CTO-QCR filter cartridge. This cartridge is a direct replacement for the o...

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    Original price $95.64 - Original price $95.64
    Original price
    $95.64
    $95.64 - $95.64
    Current price $95.64
  • Everpure 4FC-LS EV9693-16 Filter Cartridge + Scale Reduction

    Original price $99.20 - Original price $99.20
    Original price
    $99.20
    $99.20 - $99.20
    Current price $99.20

    With high capacity, the extended-life filter offers submicron particulate reduction, lead, cyst, chlorine taste & odor protection, and more. Th...

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    Original price $99.20 - Original price $99.20
    Original price
    $99.20
    $99.20 - $99.20
    Current price $99.20
  • Everpure Insurice I20002 & I40002 Filter Cartridge (Ice)

    Original price $117.30 - Original price $725.20
    Original price
    $117.30 - $725.20
    $117.30 - $725.20
    Current price $117.30

    The Pentair Everpure Insurice i2000 & i4000 replacement cartridges deliver premium water for ice machine applications. Prefilter reduces chlori...

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    Original price $117.30 - Original price $725.20
    Original price
    $117.30 - $725.20
    $117.30 - $725.20
    Current price $117.30
  • Vita Filters CTO Carbon Block & Sediment Filter Cartridge Kit

    Original price $29.99 - Original price $29.99
    Original price
    $29.99
    $29.99 - $29.99
    Current price $29.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $29.99 - Original price $29.99
    Original price
    $29.99
    $29.99 - $29.99
    Current price $29.99
  • Everpure 2CB5-S EV9617-22 Filter Cartridge 1.0 GPM (Vending & OCS)

    Original price $58.42 - Original price $58.42
    Original price
    $58.42
    $58.42 - $58.42
    Current price $58.42

    The Everpure EV9617-22 Filter Cartridge reduces limescale build-up that can cause excessive machine downtime and increased maintenance costs. Provi...

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    Original price $58.42 - Original price $58.42
    Original price
    $58.42
    $58.42 - $58.42
    Current price $58.42
  • Everpure HT-10 EV9799-22 Scale Inhibitor Cartridge

    Original price $430.92 - Original price $430.92
    Original price
    $430.92
    $430.92 - $430.92
    Current price $430.92

    Scale prevention and corrosion control for warewashing equipment. Extends the life of expensive foodservice equipment. Replacement filter cartridg...

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    Original price $430.92 - Original price $430.92
    Original price
    $430.92
    $430.92 - $430.92
    Current price $430.92
  • Everpure 4FC5-S EV9693-31 Filter Cartridge + Scale Reduction

    Original price $141.58 - Original price $141.58
    Original price
    $141.58
    $141.58 - $141.58
    Current price $141.58

    DELIVER PREMIUM QUALITY DRINKING WATER FOR ICE, STEAM, AND COFFEE APPLICATIONS.  The Everpure 4FC5S EV969331 Filter Cartridge provides clear, fres...

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    Original price $141.58 - Original price $141.58
    Original price
    $141.58
    $141.58 - $141.58
    Current price $141.58
  • Optipure 252-20620 CCM-20 20" Chloramine Reduction Filter Cartridge 2.0 GPM

    Original price $99.99 - Original price $99.99
    Original price
    $99.99
    $99.99 - $99.99
    Current price $99.99

    The Pentair OptiPure Everpure CCM-20 filter cartridge for 20" drop-in style housings, features catalytic carbon filtration for the reduction of chl...

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    Original price $99.99 - Original price $99.99
    Original price
    $99.99
    $99.99 - $99.99
    Current price $99.99
  • Enpress Pioneer CT-05-CB-AMCYL Whole House Lead Replacement Filter, 0.5 micron

    Original price $495.00 - Original price $495.00
    Original price
    $495.00
    $495.00 - $495.00
    Current price $495.00

    Pioneer Whole House Lead Replacement Filter, 0.5 micron. This is for the replacement lead reduction cartridge only for the Pioneer Whole House lea...

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    Original price $495.00 - Original price $495.00
    Original price
    $495.00
    $495.00 - $495.00
    Current price $495.00
  • Everpure 4H-L EV9635-26 Filter Cartridge (Drinking Water)

    Original price $78.55 - Original price $78.55
    Original price
    $78.55
    $78.55 - $78.55
    Current price $78.55

    Unique activated carbon-based filter blend reduces chlorine taste & odor and other offensive contaminants—premium quality water for Office Wate...

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    Original price $78.55 - Original price $78.55
    Original price
    $78.55
    $78.55 - $78.55
    Current price $78.55
  • Everpure 4CB5-S Filtration System w/ QL2 Head (Coffee)

    Original price $133.20 - Original price $133.20
    Original price
    $133.20
    $133.20 - $133.20
    Current price $133.20

    Ideal for coffee and hot beverage applications. Carbon block filter finely polishes water for high-quality drinking water and beverage and food app...

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    Original price $133.20 - Original price $133.20
    Original price
    $133.20
    $133.20 - $133.20
    Current price $133.20
  • Vita Filters CTO Carbon Block Filter & Softening Cartridge Kit

    Original price $46.99 - Original price $46.99
    Original price
    $46.99
    $46.99 - $46.99
    Current price $46.99

    Why shop with Vita Filters? Authorized Distributor for Top Brands Free Shipping • No Minimum One (1) Year Warranty 100% Satisfaction Guaranteed! O...

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    Original price $46.99 - Original price $46.99
    Original price
    $46.99
    $46.99 - $46.99
    Current price $46.99
  • Everpure QL3-4C2 Drinking Water Filtration System (Cold Cup Vending)

    Original price $159.10 - Original price $159.10
    Original price
    $159.10
    $159.10 - $159.10
    Current price $159.10

    Everpure EV960550 4C2 Filter Cartridges reduce offensive tastes and odors in water by removing contaminants. Applications: Cold Cup Vending Commer...

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    Original price $159.10 - Original price $159.10
    Original price
    $159.10
    $159.10 - $159.10
    Current price $159.10
  • Everpure 7TO EV9607-05 Filter Cartridge

    Original price $122.49 - Original price $122.49
    Original price
    $122.49
    $122.49 - $122.49
    Current price $122.49

    The Everpure 7-TO is ideal as a prefilter for RO membranes, as it is designed as a problem-solving and special application cartridge. Applications...

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    Original price $122.49 - Original price $122.49
    Original price
    $122.49
    $122.49 - $122.49
    Current price $122.49
  • Everpure 7CB5-S EV9618-21 Filter Cartridge 6-Pack (Ice)

    Original price $638.94 - Original price $638.94
    Original price
    $638.94
    $638.94 - $638.94
    Current price $638.94

    Supply clean, safe water to your ice machine and increase efficiency with this EV9618-21 7CB5-S replacement filter cartridge! This cartridge dramat...

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    Original price $638.94 - Original price $638.94
    Original price
    $638.94
    $638.94 - $638.94
    Current price $638.94
  • Everpure ESO6 EV9607-10 Water Filter Softening Cartridge 0.50 GPM (Espresso)

    Original price $134.64 - Original price $134.64
    Original price
    $134.64
    $134.64 - $134.64
    Current price $134.64

    The Everpure EV9607-10 Filter cartridge has a unique three-stage blending process to provide softened, buffered, and filtered water for specialty c...

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    Original price $134.64 - Original price $134.64
    Original price
    $134.64
    $134.64 - $134.64
    Current price $134.64
  • Everpure 4CB5-K EV9617-36 Filter Cartridge

    Original price $90.85 - Original price $90.85
    Original price
    $90.85
    $90.85 - $90.85
    Current price $90.85

    The Everpure EV9617-36 Filter Cartridge is a carbon block filter designed for foodservice, vending machine and office beverage service applications...

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    Original price $90.85 - Original price $90.85
    Original price
    $90.85
    $90.85 - $90.85
    Current price $90.85

Chloramine Reduction Filters

Chloramines are very common drinking water contaminants, and everybody is familiar with the foul taste & odor they create—at least from swimming pools, if not from drinking water. Usually, their presence is not intended, but about 25% of the most extensive public water supplies in the U.S. add the simplest one, mono-chloramine, to the water on purpose. They use chloramine instead of chlorine because it is more stable in water, allowing for disinfection over longer distances. 

About Chloramines

Chloramines are a family of disinfection byproducts (DBPs) formed from the reaction of disinfectant chlorine with the nitrogen atom (N) in ammonia (NH3) or organic compounds containing a reactive nitrogen atom. Many such biological chemicals are in drinking water, mainly derived from cellular debris from killed bacteria and algae. Mono-chloramine is the group's most straightforward and most common member, often produced intentionally from the reaction of pure chlorine and pure ammonia. 

Chloramines, in general, are undesirable in drinking water because they are toxic and because they smell and taste bad. However, mono-chloramine is tolerated because it is helpful as a secondary disinfectant, and it is the least toxic and smelly of the group. Still, concentrations above 4.0 mg/L are prohibited. The usefulness of monochloramine comes from its comparative weakness as an oxidizing agent: it retains about 5% of free chlorine's chemical power, which is not strong enough to use as a primary disinfectant, but it is still able to inhibit the re-growth of any survivors of disinfection. It is also too weak to corrode copper and brass plumbing materials, and therefore it lasts much longer in the mains—two or three days instead of just a few hours for free chlorine. Finally, monochloramine is chemically too weak to produce the other common disinfection byproducts—trihalomethanes (THMs), haloacetic acids (HAAs), and halo ketones (HKs), which may pose a health hazard. 

Typically water utility companies use free chlorine (or chlorine dioxide or ozone) only in the early water treatment steps. Then, in the end, just as the finished, treated water is about to leave the plant and go out into the water mains, pure ammonia is added to convert the free chlorine residual into chloramine. Without that final adjustment, the free chlorine would continue to produce unwanted THMs, etc., for several more hours and then be gone entirely, leaving the system with no continuing protection. 

Standard water treatment practice is to use ½ - 1 ppm of free chlorine or 1 – 2 ppm of monochloramine. Some systems attempt to counteract monochloramine's weakness by using more of it, but all that does is increase the frequency of taste & odor complaints. There is not much difference between the smell of the two at low concentrations. Still, above one ppm, the stink of monochloramine is very objectionable—much worse than free chlorine—and removing it is even more important than eliminating ordinary free chlorine, mainly if the water is used for commercial food/beverage service. 

Unfortunately, chloramine is more difficult to remove than plain free chlorine: it reacts weakly and slowly with activated carbon, just like it does with everything else. That means the water must stay in contact with the carbon much longer than if free chlorine alone was present. Many filters need more carbon for the long contact time required for removal. Only products with significant capacity will give satisfactory performance.