Shop our collection of water treatment products at Trade Supplies Online. Find useful products to prevent limescale build-up on taps, boilers and heating appliances, especially useful in hard water areas. Preventing scale build-up increases heat transfer efficiency and can lower energy bills. Browse Combiphos starter packs and scale inhibitors which are easy to install and require minimal maintenance after fitting, and discover our plumbing tools to help you get the job done quickly and easily. Our team of experts only sources high-quality products from trusted brands and suppliers, so you can be confident that you’re always getting the best.