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Replacement filters

Filters are the only part of a system that wears. Every cartridge for the AquaShield and for any 20 inch Big Blue housing is here, singly or as a kit, with the interval and the fit stated on each one. Change them on schedule and the system does exactly what it did on day one.

The six AquaShield replacement cartridges

AquaShield RO filters, 10 inch

8 products

The three RO pre-filter cartridges: sediment, GAC and carbon block

All six AquaShield stages

RO Pre-Filter Kit, 6 Month

Stages one to three. Every six months.

The full six-stage RO service kit: sediment, GAC, carbon block, membrane, post-carbon and re-mineraliser

RO Full Service Kit, 6 Stage

All six stages. When the membrane is due.

10 inch 5 micron melt-blown sediment filter cartridge

10 Inch Sediment Filter, 5 Micron

Stage one. Sand, rust and silt, before they reach the carbon.

10 inch granular activated carbon filter cartridge

10 Inch GAC Filter

Stage two. Chlorine, taste and smell.

10 inch 5 micron carbon block filter cartridge

10 Inch Carbon Block Filter, 5 Micron

Stage three. The last thing the membrane sees.

100 GPD 1812 reverse osmosis membrane element

100 GPD RO Membrane, 1812

Stage four. The one that does the purifying.

Inline post-carbon filter cartridge with push-fit elbow

Inline Post-Carbon Filter

Stage five. The taste pass between the tank and the tap.

4-in-1 re-mineraliser inline cartridge with fittings

4-in-1 Re-Mineraliser Cartridge

Stage six. Calcium and magnesium back in.

20 inch Big Blue cartridges

6 products

The three 20 inch Big Blue cartridges: 5 micron sediment, carbon block and 1 micron sediment

The AquaGuard housings the set fits

20 Inch Big Blue Cartridge Set

The AquaGuard service, in one box.

20 inch Big Blue 5 micron melt-blown sediment cartridge

20 Inch Big Blue Sediment Cartridge, 5 Micron

Housing one. The coarse load, at whole-house flow.

20 inch Big Blue carbon block cartridge

20 Inch Big Blue Carbon Block Cartridge

Housing two. Chlorine out of every shower in the house.

20 inch Big Blue 1 micron melt-blown sediment cartridge

20 Inch Big Blue Sediment Cartridge, 1 Micron

Housing three. The polish, and the stage a UV needs.

20 inch Big Blue granular activated carbon cartridge

20 Inch Big Blue GAC Cartridge

Chlorine and smell at whole-house flow, with more contact time than a block.

20 inch refillable Big Blue cartridge shell with screw caps

20 Inch Refillable Cartridge Shell

Fill it with siliphos and the scale stops. Refill it, do not replace it.

Other categories

Reverse osmosis Whole-house filtration UV sterilisers Vessels, Runxin Valves Filter media