Compact RO Water Filter With DI Stage

COM-RO & DI Compact 4 stage Reverse Osmosis Water Filter including DI Resin stage and Mixed Bed Colour Change Resin

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£63.54 inc-VAT


The compact RO with a resin stage is ideal for fish keepers and hydroponics. Compact Reverse Osmosis Water Filter system, a 4 stage filtration unit including a DI Resin stage. The filter includes a sediment pre-filter, RO membrane, GAC post filter, final resin stage with colour change resin included, and all fittings needed to fit the unit.

Reverse Osmosis alongside the correct carbon filtration process can remove chemicals from your water, such as chlorine and chloramine as well as most other total dissolved solids that normally come out of your tap. This process also removes any odours and tastes that have been caused by contaminants and chemicals.

This Reverse Osmosis Water Filter like all unpumped reverse osmosis water filters, does rely on you having a strong mains water pressure. Please do not buy this item if you do not have a good water pressure, other pumped systems are more suitable. This unit operates best as input water pressures of between 30-60psi (2-4 Bar). We would suggest that this is not suitable for use with gravity fed unpumped cold water system (where the water is stored in the loft). Normal UK water pressure should be from around 2 bar and above

Four Stage Filtration System:

Stage 1 - Sediment Filter
10" 5 Micron wound PP sediment filter

Stage 2 - RO Membrane
50 US Gallons per day Reverse Osmosis membrane (189.3 litres per day)

Stage 3 - Carbon Post Filter
10" Granular Activated Carbon filter

Stage 4 - Resin Stage

380ml Mixed bed colour change DI Resin

Dependent upon usage of the unit the 4 cartridge filters will need changing every 6 months, the membrane filter requires changing at approximately 18-36 months. The life of the Reverse Osmosis Membrane, is affected by the following factors, Bacterial Contamination (not changing pre-filters often enough), Chlorine Contamination of the membrane, (again by not changing pre-fitlers often enough) and the worst culprit, Hard Water.

We are regularly asked why we say our membranes may need changing at 18 months or less, when other sellers quote their membranes will last 3 years. We call it honest genuine expectations, our membranes are made to the same and in many cases higher specification than reverse osmosis membranes from other manufacturers. If you have very soft water or using the RO system on the output of a domestic water softener then yes you can expect a life of around 3 years. If used with a rainwater harvesting system you could expect longer as you do not have a Chlorine loading in the water you are filtering.

This products housings are made from heavy duty food grade plastics casings. The filters are manufactured by a quality ISO 9001 company a member of the Quality Water Association of America. This unit will provide you with tap water tasting as good as it gets.

We offer our complete support with this unit, just call us for any help or advice you need.


  • 10" 5 Micron wound PP sediment filter
  • 50 US Gallons per day Reverse Osmosis membrane (189.3 litres per day)
  • 10" Granular Activated Carbon filter
  • Connecting pipes
  • 3/4" tap connector
  • Flow regulator
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