Many of you ask us why they should order a new trap when your 10-year old one is still working well. Over those years, it’s had cleaning products stuck to it, with hot water expanding it and cold water shrinking it. No trap can last forever. The Multi floor drain trap is designed for indoor use, allowing a number of sewerage waste systems to be connected, and is made from polypropylene and DIN 1.4301 stainless steel. The materials used make the product resistant to corrosion, ambient stresses and varying water temperatures.