Replacement Cartridge Packs & Sets

Ensure your water filtration system remains effective with our wide range of Replacement Cartridge Packs & Sets. Whether you own a 3-stage Big Blue system, under-counter RO unit, whole-house filter, or ultrafiltration system, this collection offers convenient multi-filter kits tailored for regular maintenance and optimal performance.

Each pack is assembled with compatible filter types and micron ratings, making it easy to match the correct cartridges to your system—saving you time, effort, and ensuring uninterrupted water quality. Options are available for all major filtration brands and sizes including 10” Slimline, 20” Big Blue, T33 in-line, carbon blocks, sediment filters, and more.

• RO system replacement filter packs (3–6 stage units)
• 10” & 20” Big Blue sediment & carbon cartridge sets
• Ultrafiltration & inline filter replacement kits
• T33 post-filters & remineralisation cartridges
• Specialty cartridge kits (nitrate, iron, pH correction, Siliphos)
• NSF Certified cartridges available
• Pre-packed for biannual or annual maintenance

✔ Perfect for households, commercial sites, and contractors
✔ Convenient pre-matched filter sets
✔ Maintains water purity, taste, and safety
✔ Affordable and easy to install

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  • DARLLY Premium - Big Blue Water Filter Replacement Pack, 20 Inch (5 Micron PP, Carbon Block & 1 Micron PP) - H2O Warehouse

    Big Blue Water Filter Replacement Pack, 20 Inch (5 Micron PP, Carbon Block & 1 Micron PP)

    Replacement cartridges will fit any 20 inch Big Blue water filter system Stage 1: Sediment filter (5 Micron), removes mud, rust, dirt, floating particulates or any other large particlesStage 2: Carbon block filter reduces fine sediment, chlorine taste and the concentration of heavy metals such...
    R 589.00
    R 759.00
    R 589.00
  • DARLLY PP Melt Blown Filter 20 Inch, 1 x 1 Micron, 10 Pack - H2O Warehouse

    DARLLY PP Melt Blown Filter 20 Inch, 1 x 1 Micron, 10 Pack

    Environment-friendly POF shrinkable wrapSpecial PP pad to remove large impuritiesNSF certified natural coconut shell activated carbonRemoves pesticides and herbicides How it works:The Sediment filter assists in removing visible dirt particles such as rust, mud and sand from the water. A Melted-spray filter cartridge has a multi-layer...
    R 1,899.00
    R 2,559.00
    R 1,899.00
  • Combo 55W UV Sterilizer Complete Set + Replacement Lamp | Water Disinfection System - H2O Warehouse3 - Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV) - H2O Warehouse

    Combo 55W UV Sterilizer Complete Set + Replacement Lamp | Water Disinfection System

    The Combo 55W UV Sterilizer Complete Set with Replacement Lamp is a high-efficiency ultraviolet water purification system designed to eliminate bacteria, viruses, and harmful microorganisms, ensuring clean, safe water for homes, businesses, and industrial applications. This complete set includes a 55W UV Sterilizer Unit...
    R 2,689.00
    R 3,669.00
    R 2,689.00
  • Gutta Buddy Leaf Catcher & First Flush Kit Combo – Rainwater Harvesting Protection - H2O Warehouse

    Gutta Buddy Leaf Catcher & First Flush Kit Combo – Rainwater Harvesting Protection

    The Gutta Buddy Leaf Catcher & First Flush Kit Combo provides a complete rainwater harvesting solution, preventing debris, leaves, and contaminants from entering your storage tank. This dual system filters out large debris at the downpipe entry and flushes away the initial dirty runoff,...
    R 690.00
    R 759.00
    R 690.00
  • Combo: DARLLY Premium | 3 - Stage Big Blue Replacement Filter Set + 55W UV Lamp - H2O WarehouseCombo: DARLLY Premium | 3 - Stage Big Blue Replacement Filter Set + 55W UV Lamp - H2O Warehouse

    Combo: 3-Stage Big Blue Replacement Filter Set + 55W UV Lamp

    Ensure continuous clean and safe water with this Combo Pack, featuring a complete 3-Stage Big Blue Replacement Filter Set along with a 55W UV Lamp for added bacterial and virus protection. Designed for whole-house, commercial, and industrial filtration systems, this set guarantees high-performance filtration...
    R 1,119.00
    R 1,489.00
    R 1,119.00
  • DARLLY PP Melt Blown Filter 20 Inch, 1 x 5 Micron, 10 Pack - H2O Warehouse

    DARLLY PP Melt Blown Filter 20 Inch, 1 x 5 Micron, 10 Pack

    Environment-friendly POF shrinkable wrapSpecial PP pad to remove large impuritiesNSF certified natural coconut shell activated carbonRemoves pesticides and herbicides  How it works:The Sediment filter assists in removing visible dirt particles such as rust, mud and sand from the water. A Melted-spray filter cartridge has a multi-layer...
    R 1,899.00
    R 2,559.00
    R 1,899.00
  • 5 - Stage Reverse Osmosis Replacement Filter Set (Without Membrane) - H2O Warehouse5 - Stage Reverse Osmosis Replacement Filter Set (Without Membrane) - H2O Warehouse

    5-Stage Reverse Osmosis Replacement Filter Set (Without Membrane)

    5-Stage Reverse Osmosis Replacement Filter Set (Without Membrane) Keep your reverse osmosis system operating at its best with this replacement filter set for ALL 5-stage RO systems, excluding the RO membrane. Ideal for routine maintenance, this set includes all the pre-filters and post-filter needed...
    R 229.00
    R 289.00
    R 229.00
  • Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 10 Pack - H2O Warehouse

    Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 10 Pack

    The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particles Its made of fine melted polypropylene which is blown and spun in a cylinder-like form Melt blown with thermally...
    R 1,399.00
    R 1,849.00
    R 1,399.00
  • Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 3 Pack - H2O Warehouse

    Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 3 Pack

    The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particles Its made of fine melted polypropylene which is blown and spun in a cylinder-like form. Each cartridge is individually...
    R 419.00
    R 549.00
    R 419.00
  • 10 Inch 3 Stage Water Filter Replacement Cartridge Set - 5mic, GAC & Carbon Block - H2O Warehouse

    10 Inch 3 Stage Water Filter Replacement Cartridge Set - 5mic, GAC & Carbon Block

    Replacement cartridges will fit any 10 inch under the counter filter system Can be used as a replacement set of pre-filters for domestic reverse osmosis filter systems Stage 1: Sediment filter (5 Micron), removes mud, rust, dirt, floating particulates or any other large particles...
    R 159.00
    R 209.00
    R 159.00
  • 100 GPD 5 - Stage Reverse Osmosis Replacement Filter Set - H2O Warehouse5 - Stage Reverse Osmosis Replacement Filter Set (Without Membrane) - H2O Warehouse

    100 GPD 5-Stage Reverse Osmosis Replacement Filter Set

    100 GPD 5-Stage Reverse Osmosis Replacement Filter Set Upgrade and maintain your 5-stage reverse osmosis system with this high-quality 100 GPD replacement filter set. Designed to restore your water purification system’s peak performance, this comprehensive set includes all necessary cartridges and a 100 GPD...
    R 485.00
    R 689.00
    R 485.00
  • 75 GPD 5 - Stage Reverse Osmosis Replacement Filter Set - H2O Warehouse5 - Stage Reverse Osmosis Replacement Filter Set (Without Membrane) - H2O Warehouse

    75 GPD 5-Stage Reverse Osmosis Replacement Filter Set

    75 GPD 5-Stage Reverse Osmosis Replacement Filter Set Upgrade and maintain your 5-stage reverse osmosis system with this high-quality 75 GPD replacement filter set. Designed to restore your water purification system’s peak performance, this comprehensive set includes all necessary cartridges and a 75 GPD...
    R 435.00
    R 599.00
    R 435.00
  • 50 GPD 5 - Stage Reverse Osmosis Replacement Filter Set - H2O Warehouse5 - Stage Reverse Osmosis Replacement Filter Set (Without Membrane) - H2O Warehouse

    50 GPD 5-Stage Reverse Osmosis Replacement Filter Set

    50 GPD 5-Stage Reverse Osmosis Replacement Filter Set Upgrade and maintain your 5-stage reverse osmosis system with this high-quality 50 GPD replacement filter set. Designed to restore your water purification system’s peak performance, this comprehensive set includes all necessary cartridges and a 50 GPD...
    R 409.00
    R 589.00
    R 409.00
  • Big Blue 20 inch CTO Carbon Block Water Filter Replacement Cartridge - 3 Pack - H2O Warehouse

    Big Blue 20 inch CTO Carbon Block Water Filter Replacement Cartridge - 3 Pack

    Replacement cartridge will fit any 20-inch big blue filter housing Greatly reduces the taste and smell of chlorine Filters out organic materials and sediments Enclosed in a 5-micron filter membrane Replace once every 12 months (depending on the quality of water supply) Activated carbon is treated or...
    R 1,029.00
    R 1,159.00
    R 1,029.00
  • Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 4 Pack - H2O Warehouse

    Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 4 Pack

    The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particles Its made of fine melted polypropylene which is blown and spun in a cylinder-like form. Each cartridge is individually...
    R 569.00
    R 749.00
    R 569.00
  • Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 10 Pack - H2O Warehouse

    Big Blue 20 inch 5 Micron Sediment Water Filter Replacement Cartridge - 10 Pack

    The Big Blue 5 Micron Sediment Water Filter Replacement Cartridge (20 Inch – 10 Pack) is designed to provide superior sediment filtration, ensuring cleaner and safer water. These cartridges effectively remove fine particles such as sand, silt, dirt, and rust from drinking water, protecting...
    R 1,399.00
    R 1,849.00
    R 1,399.00
  • DARLLY Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 4 Pack - H2O Warehouse

    Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 4 Pack

    The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particles Its made of fine melted polypropylene which is blown and spun in a cylinder-like form Melt blown with thermally...
    R 569.00
    R 749.00
    R 569.00
  • DALLY Premium - Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack - H2O Warehouse

    Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack

    The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particles Its made of fine melted polypropylene which is blown and spun in a cylinder-like form Melt blown with thermally...
    R 419.00
    R 549.00
    R 419.00
  • O - Ring Set for 3 Stage 20 Inch Big Blue Filter Unit | 6 units - H2O Warehouse
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    O-Ring Set for 3 Stage 20 Inch Big Blue Filter Unit | 6 units

    Replacement O-Ring Kit for Big Blue Housing Seals Ensure leak-free performance and proper pressure sealing with this 6-piece O-ring replacement set for the 3-stage 20-inch Big Blue filter housing system. Product Features: High-Quality EPDM Material: Durable and chemical-resistant for long-lasting performance. Double O-Ring Design:...
    R 580.00
    R 720.00
    R 580.00
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  • DARLLY Premium - 3 Pack Big Blue Water Filter Replacement, 20 Inch (3x5 Micron PP, 3xCarbon Block & 3x1 Micron PP) 9 Items - H2O Warehouse

    3 Pack Big Blue Water Filter Replacement, 20 Inch (3x5 Micron PP, 3xCarbon Block & 3x1 Micron PP) 9 Items

    Replacement cartridges will fit any 20 inch Big Blue water filter system Stage 1: 3x sediment filter (5 Micron), removes mud, rust, dirt, floating particulates or any other large particlesStage 2: 3x carbon block filter reduces fine sediment, chlorine taste and the concentration of heavy...
    R 1,599.00
    R 2,277.00
    R 1,599.00
  • DARLLY Premium - 3 Pack Big Blue Water Filter Replacement, 20 Inch (3x5 Micron PP, 3xCarbon Block & 3x1 Micron PP) 9 Items - H2O Warehouse

    DARLLY Premium - 3 Pack Big Blue Water Filter Replacement, 20 Inch (3x5 Micron PP, 3xCarbon Block & 3x1 Micron PP) 9 Items

    Premium DARLLY Replacement cartridges will fit any 3 Sage 20 inch Big Blue water filter system Stage 1: 3x DARLLY meltblown sediment filter (5 Micron), removes mud, rust, dirt, floating particulates or any other large particlesStage 2: 3x Carbon Block 800mg/g filter reduces fine...
    R 1,999.00
    R 2,389.00
    R 1,999.00
  • Combo: DARLLY Premium | 3 - Stage Big Blue Replacement Filter Set + 55W UV Lamp - H2O WarehouseCombo: DARLLY Premium | 3 - Stage Big Blue Replacement Filter Set + 55W UV Lamp - H2O Warehouse

    Combo: DARLLY Premium | 3-Stage Big Blue Replacement Filter Set + 55W UV Lamp

    Ensure continuous clean and safe water with this Premium DARLLY Combo Pack, featuring a complete 3-Stage Big Blue Replacement Filter Set along with a 55W UV Lamp for added bacterial and virus protection. Designed for whole-house, commercial, and industrial filtration systems, this set guarantees...
    R 1,319.00
    R 1,689.00
    R 1,319.00
  • DARLLY Premium - Big Blue Water Filter Replacement Pack, 20 Inch (5 Micron PP, Carbon Block & 1 Micron PP) - H2O WarehouseDARLLY Premium - Big Blue Water Filter Replacement Pack, 20 Inch (5 Micron PP, Carbon Block & 1 Micron PP) - H2O Warehouse

    DARLLY Premium - Big Blue Water Filter Replacement Pack, 20 Inch (5 Micron PP, Carbon Block & 1 Micron PP)

    Replacement cartridges will fit any 20 inch Big Blue water filter system Stage 1: DARLLY sediment filter (5 Micron), removes mud, rust, dirt, floating particulates or any other large particlesStage 2: Carbon Block 800mg/g filter reduces fine sediment, chlorine taste and the concentration of heavy metals...
    R 699.00
    R 759.00
    R 699.00
  • DARLLY Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 4 Pack - H2O WarehouseDALLY Premium - Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack - H2O Warehouse

    DARLLY Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 4 Pack

    PREMIUM DARLLY 20" Big Blue 1 Micron 4 Pack The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particlesIts made of fine melted polypropylene which is blown and spun...
    R 779.00
    R 889.00
    R 779.00
  • DALLY Premium - Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack - H2O WarehouseDALLY Premium - Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack - H2O Warehouse

    DALLY Premium - Big Blue 20 inch 1 Micron Sediment Water Filter Replacement Cartridge - 3 Pack

    PREMIUM DARLLY 20" 1 Micron Meltblown 3 Pack The function of a sediment filter is to remove large and fine particles from the drinking water, such as sand, dirt, silt and rust particlesIts made of fine melted polypropylene which is blown and spun in...
    R 629.00
    R 749.00
    R 629.00

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