Best Sellers

Discover our most popular and trusted products in the Best Sellers collection—chosen by homeowners, contractors, and professionals across South Africa for their proven performance, durability, and value. Whether you're shopping for water filtration, irrigation, borehole equipment, UV systems, or pumps, these customer favourites represent the best of what H2O Warehouse has to offer.

Updated regularly based on real-time customer purchases, industry demand, and seasonal trends, this collection highlights high-performing essentials and must-have products across all departments. Ideal for first-time buyers and trade professionals alike.

• Top-rated water filters and replacement cartridges
• Best-selling UV sterilisers and lamps
• Most popular irrigation controllers & solenoids
• High-demand borehole pumps and accessories
• Proven filtration media like Katalox Light, GAC, and AFM®
• Customer favourites across domestic and commercial sectors

✔ Trusted by hundreds of happy customers
✔ In-stock and ready to ship nationwide
✔ Proven performance and customer satisfaction
✔ Perfect starting point for building your water system

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  • 3 - Stage Big Blue Water Filtration System with 55W UV Steriliser – Includes 2 Sediment & 1 Carbon Block Filters - H2O Warehouse3 - Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV) - H2O Warehouse

    3-Stage Big Blue Water Filtration System with 55W UV Steriliser – Includes 2 Sediment & 1 Carbon Block Filters

    The 3-Stage Big Blue Water Filtration System with 55W UV Steriliser provides a comprehensive water purification solution, ensuring clean, safe, and bacteria-free water for residential, commercial, and industrial applications. With two sediment filters (5-micron & 1-micron) and a carbon block filter, this system effectively...
    R 4,398.00
    R 5,129.00
    R 4,398.00
  • Rain Bird RC2 - 8 - 230 WiFi Smart Outdoor Controller | 8 Zone, 230V - H2O Warehouse

    Rain Bird RC2-8-230 WiFi Smart Outdoor Controller | 8 Zone - Wifi Ready

    The Rain Bird RC2-8-230 is an 8-zone Wi-Fi smart irrigation controller, designed for residential and light commercial irrigation systems that require remote access, intelligent scheduling, and maximum water efficiency. With built-in Wi-Fi connectivity, the RC2-8-230 allows users to control watering schedules via the Rain...
    R 2,806.00
    R 3,301.00
    R 2,806.00
  • Katalox Light® Media FRP Vessel 18x65 – Automatic Backwash Complete with Media - H2O Warehouse

    Katalox Light® Media FRP Vessel 14x65 – Automatic Backwash Complete with Media

    The Katalox Light® Media FRP Vessel 14x65 with automatic backwash is a premium, high-capacity water filtration system engineered for the efficient removal of iron, manganese, hydrogen sulphide, arsenic, and turbidity from water supplies. Featuring a robust 14x65 FRP vessel, a RUNXIN automatic backwash head,...
    R 17,523.00
    R 19,469.00
    R 17,523.00
  • Disc Filter – 2" (50mm) | 130 Micron | Manual Clean - H2O Warehouse

    Disk Filter – 2" (50mm) | 130 Micron with Flush Valve

    The 2-Inch Disk Filter with 130 Micron filtration rating offers effective protection for irrigation systems by capturing fine particles, sand, and organic matter. Designed for small to medium-scale agricultural, landscape, or residential systems, it is ideal for safeguarding drip lines, sprinklers, and valves from...
    R 629.00
    R 785.00
    R 629.00
  • 3 Stage 20 - Inch Big Blue Filtration Unit with 55W UV Steriliser (Stainless Steel) | Includes Filters - H2O Warehouse3 - Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV) - H2O Warehouse

    3 Stage 20-Inch Big Blue Filtration Unit with 55W UV Steriliser (Stainless Steel) | Includes Filters

    Upgrade your home’s water system with the H2O Warehouse 3-Stage 20" Big Blue Filtration Unit, now integrated with a high-performance 55W stainless steel UV steriliser. This premium "Point of Entry" system offers comprehensive water purification and disinfection, ensuring safe, crystal-clear water for your entire...
    R 7,898.00
    R 10,653.00
    R 7,898.00
  • 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
  • Pressure Gauge (0 - 25 Bar, 63mm Diameter, ¼Inch Bottom Entry) - H2O Warehouse

    Pressure Gauge (0-25 Bar, 63mm Diameter, ¼Inch Bottom Entry)

    The Pressure Gauge, 0-25 Bar, 63mm, 1/4 Inch Bottom Entry, gives an immediate reading of the pressure in your pipe or vessel. Product specifications: Connection: 1/4 Inch, Bottom Measurement range: 0 - 25 Bar Gauge diameter: 63mm
    R 289.00
    R 389.00
    R 289.00
  • Nanosilver Post Carbon Water Filter Replacement Cartridge for RO Units - H2O Warehouse

    T33 Nanosilver Post Carbon Water Filter Replacement Cartridge for RO Units

    The Nanosilver Post Carbon Water Filter Replacement Cartridge for RO Units is designed to remove unpleasant tastes, odours sediments and bacteria to produce cleaner, clearer and better-tasting water. It is used in the last stage of standard 5-stage residential Reverse Osmosis purification systems, downstream...
    R 278.00
    R 309.00
    R 278.00
  • 3 Stage 20Inch Big Blue Filtration Unit (Stainless Steel) incl Filters - H2O Warehouse3 - Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (5 Micron Sediment + Carbon Block + Siliphos Cartridge) - H2O Warehouse

    3 Stage 20Inch Big Blue Filtration Unit (Stainless Steel) incl Filters

    Premium Whole-House Water Filtration – Without UV This high-capacity 3-stage Big Blue system is designed to deliver exceptional water filtration performance for your entire home. Built on a strong stainless steel frame with powder-coated black finish, the system offers flexibility for wall-mounted or freestanding...
    R 5,898.00
    R 8,097.00
    R 5,898.00
  • Calcite pH Fix Media, NSF Certified, 25kg - H2O Warehouse

    Calcite pH Fix Media, NSF Certified, 25kg

    Reduce the corrosive properties of acidic water instantly with this pH correcting water filter media which contains naturally occurring calcium carbonate mediaEliminate staining of sanitary ware from dripping taps by reducing the leaching of copper, lead and other metals found in typical plumbing systemsSlows down...
    R 629.00
    R 859.00
    R 629.00
  • 3 - Stage Big Blue Water Filtration System – 20 Inch, 2720 L/h (1 & 5 Micron Sediment + Carbon Block Filters) - H2O Warehouse3 - Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (5 Micron Sediment + Carbon Block + Siliphos Cartridge) - H2O Warehouse

    3-Stage Big Blue Water Filtration System – 20 Inch, 2720 L/h (1 & 5 Micron Sediment + Carbon Block Filters)

    The 3-Stage Big Blue Water Filtration System is a high-capacity water filtration solution designed for residential, commercial, and light industrial applications. This system processes up to 2720 litres per hour, effectively removing sediment, chlorine, and other contaminants, delivering clean, safe, and great-tasting water. Equipped...
    R 2,489.00
    R 2,898.00
    R 2,489.00
  • 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
  • AFM® Media FRP Vessel 14x65 – Auto Backwash Complete with Media - H2O Warehouse

    AFM® Media FRP Vessel 13x54 – Automatic Backwash Complete with Media

    The AFM® Media FRP Vessel 13x54 with automatic backwash is a high-capacity, advanced water filtration system designed for exceptional performance in residential, commercial, and industrial applications. Featuring a robust 13x54 FRP vessel, RUNXIN automatic backwash head, and premium AFM® (Activated Filter Media), this system...
    R 11,619.00
    R 12,910.00
    R 11,619.00
  • Katalox Light Media FRP Vessel 12x52 Manual Backwash Complete With Media - H2O Warehouse

    Katalox Light Media FRP Vessel 12x52 Manual Backwash Complete With Media

    Katalox Light Media FRP Vessel 12x52 Manual Backwash Complete with Media Product Description: The Katalox Light Media FRP Vessel 12x52 is designed for manual backwashing in medium to large water filtration systems. With a capacity of 1,500 litres per hour, it efficiently removes iron,...
    R 9,420.00
    R 10,459.00
    R 9,420.00
  • Rain Bird ESP - TM2 - 4 Outdoor Irrigation Controller | 4 Zone, Wi - Fi Ready - H2O Warehouse

    Rain Bird ESP-TM2-4 Outdoor Irrigation Controller | 4 Zone - Wi-Fi

    The Rain Bird ESP-TM2-4 is a 4-zone outdoor irrigation controller, designed for small residential landscapesrequiring reliable, programmable, and efficient irrigation control. With Wi-Fi upgradeability via the LNK2 Wi-Fi Module (sold separately), homeowners can remotely manage watering schedules, adjust irrigation based on real-time weather conditions,...
    R 2,616.00
    R 3,078.00
    R 2,616.00
  • Darlly Antibacterial Filter Cartridge – Meltblown 1 Micron | 10" & 20", Slimline & Big Blue - H2O WarehouseDarlly Antibacterial Filter Cartridge – Meltblown 1 Micron | 10" & 20", Slimline & Big Blue - H2O Warehouse
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    Darlly Antibacterial Filter Cartridge – Meltblown 1 Micron | 10" & 20", Slimline & Big Blue

    Darlly Antibacterial Filter Cartridge – Meltblown 1 Micron | 10" & 20", Slimline & Big Blue Enhanced Protection with Silver Ion Antibacterial Technology The Darlly Antibacterial Meltblown Filter Cartridges are designed to provide superior sediment filtration while actively inhibiting bacterial growth within the filter...
    From R 139.00
    R 179.00
    From R 139.00
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  • 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
  • AFM® Media FRP Vessel 14x65 – Manual Backwash Complete with Media - H2O Warehouse

    AFM® Media FRP Vessel 13x54 – Manual Backwash Complete with Media

    The AFM® Media FRP Vessel 13x54 – Manual Backwash system provides high-performance filtration, removing sediment, heavy metals, organic contaminants, and bacteria for cleaner, safer water. Designed for residential, commercial, and industrial water treatment, this system outperforms traditional sand filters by using AFM® (Activated Filter...
    R 7,585.00
    R 8,450.00
    R 7,585.00
  • Pressure Gauge (0 - 100 Bar, 63mm Diameter, ¼Inch Bottom Entry) - H2O Warehouse

    Pressure Gauge (0-100 Bar, 63mm Diameter, ¼Inch Bottom Entry)

    The Pressure Gauge, 0-100 Bar, 63mm, 1/4 Inch Bottom Entry, gives an immediate reading of the pressure in your pipe or vessel. Product specifications: Connection: 1/4 Inch, Bottom Measurement range: 0 - 100 Bar Gauge diameter: 63mm
    R 299.00
    R 399.00
    R 299.00
  • Katalox Light® Iron, Manganese & Hydrogen Sulfide Removal Filter Media, NSF Certified, 30kg - H2O Warehouse

    Katalox Light® Iron, Manganese & Hydrogen Sulfide Removal Filter Media, NSF Certified, 30kg

    Katalox Light® is an advanced filtration media developed in Germany, engineered with a unique MnO2 coating technique on ZEOSORB® & is being used in numerous systems for residential, commercial, industrial & municipal applications worldwide. Advanced filtration media with a high content MnO2 coating (10%)...
    R 2,865.00
    R 3,371.00
    R 2,865.00
  • 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
  • LEO Self Priming JET Pump 0.75KW - Cast Iron - H2O Warehouse

    LEO Self Priming JET Pump 0.75KW - Cast Iron | AJm75(220V)

    LEO Self Priming JET Pump 0.75KW - Cast Iron This LEO Self Priming JET Pump 0.75KW in Cast Iron is designed for robust water transfer and pressure boosting tasks. With its 0.75KW motor, this pump offers reliable performance for domestic and small agricultural applications....
    R 2,879.00
    R 3,288.00
    R 2,879.00
  • Karofi 5 - Stage 75GPD Under - Counter Reverse Osmosis System (Without Pump) - H2O WarehouseKarofi 5 - Stage 75GPD Under - Counter Reverse Osmosis System (Without Pump) - H2O Warehouse

    Karofi 5-Stage 75GPD Under-Counter Reverse Osmosis System (Without Pump)

    The Karofi 5-Stage 75GPD Under-Counter Reverse Osmosis System (Without Pump) provides high-quality purified water, ideal for homes and small businesses with stable incoming water pressure. This compact, space-saving system effectively removes sediment, chlorine, heavy metals, bacteria, and other contaminants, ensuring clean and great-tasting drinking...
    R 1,869.00
    R 2,189.00
    R 1,869.00
  • 10 Inch Nylon Mesh Filter 100 micron | Washable - H2O Warehouse

    10 Inch Nylon Mesh Filter 100 micron | Washable

    10 Inch Nylon Mesh Filter – 100 Micron (Washable) The 10 Inch Nylon Mesh Filter with 100-micron filtration is an efficient and durable solution for removing sediment, debris, and other fine particles from your water supply. Designed with high-quality nylon mesh, this filter is...
    R 295.00
    R 395.00
    R 295.00
  • AFM® Media FRP Vessel 14x65 – Manual Backwash Complete with Media - H2O Warehouse

    AFM® Media FRP Vessel 14x65 – Manual Backwash Complete with Media

    The AFM® Media FRP Vessel 14x65 – Manual Backwash system is designed for high-performance water filtration, delivering exceptional removal of sediment, organic matter, heavy metals, and bacteria. Using AFM® (Activated Filter Media) instead of traditional sand, this system provides self-sterilising, chemical-free filtrationwith greater efficiency...
    R 9,469.00
    R 10,879.00
    R 9,469.00
  • Complete FRP Filter Media Vessel Kits – Auto & Manual | All Sizes | Without Media - H2O WarehouseComplete FRP Filter Media Vessel Kits – Auto & Manual | All Sizes | Without Media - H2O Warehouse
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    Complete FRP Filter Media Vessel Kits – Auto & Manual | All Sizes | Without Media

    Our Complete FRP Filter Vessel Kits offer a robust and ready-to-assemble solution for a wide range of water treatment applications. Supplied without media, each kit includes a high-quality CANATURE FRP pressure vessel, a correctly matched Runxin control valve (manual or automatic), top and bottom...
    From R 2,412.00
    R 2,658.00
    From R 2,412.00
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  • 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
  • 3 - Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (5 Micron Sediment + Carbon Block + Siliphos Cartridge) - H2O Warehouse3 - Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (5 Micron Sediment + Carbon Block + Siliphos Cartridge) - H2O Warehouse

    3-Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (5 Micron Sediment + Carbon Block + Siliphos Cartridge)

    3-Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos Cartridge) The 3-Stage Big Blue Descale Filtration System is a point-of-entry whole-house water filter that delivers clean, fresh water to every tap while protecting your plumbing...
    R 3,349.00
    R 3,898.00
    R 3,349.00
  • 3 - Stage Big Blue Water Filtration System with 55W UV Steriliser – Includes 2 Sediment & 1 Carbon Block Filters - H2O Warehouse3 - Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV) - H2O Warehouse

    3-Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV)

    3-Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV) The 3-Stage Big Blue Descale + UV Filtration System is a whole-house water treatment solution that provides clear, safe, and scale-free...
    R 5,398.00
    R 6,229.00
    R 5,398.00

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