Deionisation and DI Resin

Finest Filters offers the best Deionisation (DI) Resin & RO Resin filters as an ideal replacement resin for your Reverse Osmosis unit. Our DI Resin & RO Resin is compatible with all RO holders. Enjoy same-day despatch on orders placed before 4pm – with no minimum order quantity. Browse our range of DI Resins below.

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  1. Compact Reverse Osmosis RO Unit DI Deionisation Add On Stage

    You are purchasing a add on De-ionisation kit for addition to any compact reverse osmosis unit.

    This extra filter stage will convert any 3 stage unit into a 4 stage unit, and the de-ionisation resin will reduce the TDS (total dissolved solids) within the product water further, resulting in ultra pure RO water.

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  2. 10" DI Chamber including Housing, Resin Holder, Resin, Connectors and Tubing

    This DI Unit set comprises of the following:

    1 x 10" Clear Housing.
    1 x 10" DI Resin Holder Cartridge filled with resin.
    2 x 1/4" Push Fit Connectors.
    2m length of 1/4" tubing.
    1 x Housing Spanner


    This set is an ideal DI stage to add to current Reverse Osmosis Units which do not have a DI stage. Simply take the output pipe from your membrane, and run it though this DI unit, to reduce your TDS to 0. An ideal add on for your Reverse Osmosis unit!

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  3. 1 Litre Deionising (DI) Resin

    Our high quality Mixed Bed Tulsion DI Resin is ideal for ensuring 000TDS from your RO Unit.

    Suitable for all types of Reverse Osmosis filters / Deionising filters. Pure water is required for many application such as Aquariums, Window Cleaning etc.

    Quantity you are purchasing: 1000ml (1 litre).

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  4. 3 Litres Deionising (DI) Resin Pouch

    Our high quality Mixed Bed Tulsion DI Resin is ideal for ensuring 000TDS from your RO Unit.

    Suitable for all types of Reverse Osmosis filters / Deionising filters. Pure water is required for many application such as Aquariums, Window Cleaning etc.

    Quantity you are purchasing: 3000ml (3 litres).

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  5. 5 Litres Deionising (DI) Resin Pouch

    Our high quality Mixed Bed Tulsion DI Resin is ideal for ensuring 000TDS from your RO Unit.

    Suitable for all types of Reverse Osmosis filters / Deionising filters. Pure water is required for many application such as Aquariums, Window Cleaning etc.

    Quantity you are purchasing: 5000ml (5 litres).

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