Direct Flow 4-Stage Reverse Osmosis 300-Gallons-Per-Day (US Gallons) Water Filter System with Pressure Gauge

Through an accurate combination of pre-filtration, activated carbons, reverse osmosis and post-filtration treatments, this system will remove high levels of sediment, particulates, emerging contaminants, volatile organic compounds and bacterial impurities from your water.


  • Four stages of filtration
  • Hand built with push-fit style connections
  • Easy maintenance
  • Completely assembled and ready to install with full instructions
  • 100% factory tested and sterilized
  • 3-layer-composite low-pressure membrane for enhanced water purity
  • Produces great-tasting water for drinking and cooking
  • Less expensive than bottled water
  • Manufactured from WQA ISO9001 compliant material
£160.15 £133.46
In stock

Point-of-Use (POU) systems can filter out bad tastes, colours or odours, which may pose no health risk but still affect the quality of your water. This system will improve the flavour of water used for drinking and cooking. It is perfect for almost any household and will easily fit into any compact space, either in the kitchen or under counter. Its 300 gallons-per-day (US Gallons) output means it is especially suited for domestic use, and in particular for families and households of four or more people requiring large volumes of high-quality pure water.

This set includes: reverse osmosis system, 5 micron-rating sediment filter, granular activated carbon filter, block activated carbon filter and 300 gallons-per-day (US Gallons) RO membrane, 3/4" to 3/8" feed water connector, tubing, instructions, accessories and box.

Due to its high membrane quality this system is capable of purifying up to 25 – 30 litres of water per hour. An ultra-low micron rating of 0,0001 µm allows it to remove most contaminants from water including bacteria and viruses. System is also equipped with an in-built pressure gauge, enabling the user to monitor filter performance which may impair flow rates if deposits such as lime or other sediments build up around the cartridges.


  • Connection adapter: 3/4" and 3/8"
  • Working Temp.: 2°C - 45°C (35ºF - 113ºF)
  • Flow Rate: 25 - 30 litres per hour (6 – 8 gallons per hour)
  • Operating Pressure: Max. 6.0 bar (90 psi) Min. 2.8 bar (40 psi)
  • Typical Rejection Rate: 98% TDS (Total Dissolved Solids)
  • pH Parameters: Maximum 11 Minimum 2
  • Iron: Maximum 0.2 ppm
  • TDS (Total Dissolved Solids) < 1800 ppm
  • Turbidity < 5 NTU
  • Tubing: Polyethylene 3/8”

Complete package contains:

  • 4 stage reverse osmosis system comes complete with the following cartridges: 5 micron-rating sediment filter, granular activated carbon filter, block activated carbon filter.
  • RO membrane element type: RT-2812-300
  • Heavy duty FDA certified filter housings (manufactured by an ISO9001 registered company and member of the Water Quality Association of America).
  • Feed water connector: 3/4” and 3/8"
  • In-built analogue pressure gauge
  • Drain saddle valve, filter and membrane housing wrench
  • 3/8" tubing for system connection
  • Installation and use instructions
  • Box


  • 1) PP. Sediment pre-filter. Spun-bounded polypropylene. 20 micron sediment filter traps dirt, sediment, rust and other particulate matter. Set also includes 5 micron sediment filter (FCPS5) for users requiring a finer level of pre-filtration.
  • 2) GAC. Carbon cartridge. Activated coconut shell carbon (GAC). Coconut shell carbon reduces chlorine, colour, odour and other organic impurities
  • 3) CTO. Carbon cartridge pre-filter. Extruded activated carbon. Carbon block filter is used to further reduce chlorine, colour, odour and other organic impurities
  • 4) RT-2812-300. Single reverse osmosis 3-layer-composite low-pressure membrane (300 GPD - US Gallons), 0.0001 micron. Semi-permeable membrane will remove salts, minerals, metals, bacteria, viruses, cysts, TDS, hardness, fluorides, pesticides, lead, mercury, cadmium, arsenic and more. Due to the time needed to remove all these ingredients VYAIR recommends purchasing a water storage tank with this RO system.

IMPORTANT: Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system. Water filtration systems can help reduce the presence of contaminants. In addition, some water filtration systems can help reduce the presence of micro-organisms or other contaminants that pose potential health risks. Regularly scheduled maintenance and replacement of the filter cartridges is recommended in order for the product to perform as specified.

Replace the filter cartridges at least every 3 or 6 months (depending on water quality).

Replace the RO membrane every 2 to 3 years (depending on water quality).

LIMITED WARRANTY: VYAIR warrants that this product is free from defects in materials and workmanship. This warranty, together with any and all warranties implied by law, shall be limited to a period of two (2) years from the date of original purchase. This limited warranty does not apply to failures that result from abuse, misuse, alteration or failure to properly comply with installation, or cartridge change instructions. VYAIR strongly recommends adding to all point of use filtration systems a Pressure Limiting Valve (call for further details) to guard against unwanted extreme water pressure events, pressure increases, surges, and water hammer which could occur in the water pipes. Not having one installed could mean that if you ever did have to claim damage caused by a burst water filter system, your claim could be denied.

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