Big Blue twin housing kits are used for whole-of-house water treatment and are fitted with a sediment filter and a carbon filter. Big Blue single housing kits filter mains, rain and bore water and can be fitted with either a sediment filter or a carbon filter.

The sediment filter removes dirt, rust and sediment deposits, regardless of water type. As well as improving taste, the carbon filter captures bacteria and removes chlorine, chlorine by- products (trihalomethanes) and odour from mains water. With rain and bore water, the carbon filter captures bacteria and removes colour and odour.