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. Please see faqs for more details. 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.