– All made of stainless steel AIS 18/8. Pan joints are welded with argon welding method and are leak-proof. There are special ears that allow the pans to be held to concrete. There are removable 25×25 mm spaced serrated honeycombs that prevent slipping. The siphon welded to the drain pan prevents odor. There is a strainer on the siphon that solids cannot pass through.