Our Premium Range of drinking water filter kits. There should be a model here to suit the requirements of most customers. To help in deciding please go to how to choose a water filter. All models are supplied with quality installation components, all push-fit fittings and of course full instructions. The WK200, 300, 400 kits all have our superior Intertap with 1/4 turn ceramic disc valve. They also feature the extremely simple twist-off cartridge system which makes cartridge changes as simple as changing a light bulb. All models have 3/8” tubing for faster flow rates.