3.5-4" Waterless Trap Seal

How it works.

Green Drain is a one-way valve for your floor drain. Water flows down and out. Nothing comes back up.

Inside sits a soft silicone valve. Running water pushes it open; the moment the water stops, it closes and seals tight against sewer gas, odours, and pests. Because it seals with silicone instead of water, it never dries out the way an ordinary trap can, even when the drain goes weeks without use.

It fits 3.5 to 4-inch drains, 90 to 100 mm, and drops in by hand. No tools, no plumber, installed in seconds.