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    Water Filter Cartridges

    Shop Water Doctor filter cartridges and compatible parts by system model and size.

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    10 products
    • Water Doctor COMO-R700 PCB replacement filter cartridge Water Doctor COMO-R700 RO replacement filter cartridge

      Water Doctor COMO-R700 Replacement Filter Cartridges – PCB / RO

      ReplacementModel · 2
      Regular price From $89.99 CAD
      View details →
    • Water Doctor PP sediment replacement filter cartridge Water Doctor 2.5 x 10 RO replacement filter cartridge

      Water Doctor 2.5 x 10 Replacement Filter Cartridges – PP / CTO / GAC / T33 / RO

      ReplacementModel · 5
      Regular price From $12.99 CAD
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    • Water Doctor ROS4A quick-twist RO replacement cartridges Water Doctor ROS4A quick-twist RO replacement cartridges
      Pre-order

      Water Doctor ROS4A Replacement Filter Cartridges – PP / CTO / T33 / RO

      ReplacementModel · 4
      Regular price From $49.99 CAD
      View details →
    • Water Doctor COMO-R1000 PPC replacement filter cartridge Water Doctor COMO-R1000 ROC replacement filter cartridge

      Water Doctor COMO-R1000 Replacement Filter Cartridges – PPC / ROC

      ReplacementModel · 2
      Regular price From $89.99 CAD
      View details →
    • Water Doctor GF3 800GPD PPC RO and 3C replacement filters Water Doctor GF3 800GPD PPC RO and 3C replacement filters

      Water Doctor GF3 800GPD Replacement Filters – PPC / RO / 3C

      ReplacementModel · 3
      Regular price From $70.00 CAD
      View details →
    • Water Doctor ROS4B quick-twist RO replacement cartridges Water Doctor ROS4B quick-twist RO replacement cartridges

      Water Doctor ROS4B Replacement Filter Cartridges – PP / CTO / T33 / RO

      ReplacementModel · 4
      Regular price From $49.99 CAD
      View details →
    • Water Doctor 4.5 x 10 Replacement Filter Cartridges – PP / PS / PL / CTO / GAC Water Doctor 4.5 x 10 Big Blue replacement filter cartridge

      Water Doctor 4.5 x 10 Replacement Filter Cartridges – PP / PS / PL / CTO / GAC

      ReplacementModel · 5
      Regular price From $17.99 CAD
      View details →
    • Water Doctor PP sediment replacement filter cartridge Water Doctor 4.5 x 20 Big Blue replacement filter cartridge

      Water Doctor 4.5 x 20 Replacement Filter Cartridges – PP / PS / PL / CTO / GAC

      ReplacementModel · 5
      Regular price From $28.99 CAD
      View details →
    • Water Doctor alkaline 6-stage RO replacement cartridge Water Doctor Alkaline 6-Stage Cartridge Filter

      Water Doctor Alkaline 6-Stage Cartridge Filter

      Replacement
      Regular price $250.00 CAD
      View details →
    • Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS / PL / CTO / GAC Water Doctor 2.5 x 20 replacement filter cartridge

      Water Doctor 2.5 x 20 Replacement Filter Cartridges – PP / PS / PL / CTO / GAC

      ReplacementModel · 5
      Regular price From $19.99 CAD
      View details →
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