The Dial 5179 1/4" Scale Eliminator is a highly-reliable, durable product from Dial. This cartridge attaches to 1/4" copper or poly tube water line using 1/4" cc Brass Fittings. It controls scale build-up and corrosion in coolers. It's special formula holds minerals in suspension by raising the solubility level of the water. It reduces mineral build-up on pads and must be used with a bleed off kit or PowerClean purge pump to flush suspended minerals.