NIBCO pecent PEX delivers clean, safe potable water because there are no toxic chemical additives in the material, no leaching of colors and there is no metal taste or odor. In addition, NIBCO pecent PEX is chlorine-resistant, corrosion-resistant, freeze-resistant and abrasion-resistant. The excellent thermal properties of PEX means hot water stays hot and cold water stays cold. In addition, the insulating properties of PEX eliminate the noise and vibration from water hammer. NIBCO pecent PEX tubing, fittings, valves, and manifolds are designed to be used as a complete system, and are backed by a NIBCO INC. limited warranty.