Our WRAS-approved undermount sink water filter includes push-fit connectors and a Biotect Ultra water filter cartridge. As a mains water filter, you can opt for a 3-way mixer tap, delivering hot/cold and filtered water or a single spout or install a pillar tap that sits separately from your main tap. Easy push-fit connection, no plumber required* Reduces chlorine, microplastics, bacteria and cysts, insecticides and herbicides, and heavy metals. Discrete undermount sink water filter Better-tasting water in every drop *dependent on DIY expertise.