The backbone of residential plumbing. Showers, laundry rooms, basement floor drains. Drop-in install, no tools required.
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Four flexible silicone sealing ribs form a one-way valve. Water passes through freely under gravity. Showers, laundry discharge, and mop water all drain normally.
When flow stops, the ribs close to create a continuous mechanical seal that blocks gas, odor, and pests from coming back up.
Drop-in installation. No tools. No plumber. No connection to a water supply.
| Model | GD15 |
| Pipe Size | 1.5" (38 mm) / DN40 |
| Height | 28 mm |
| Housing Diameter (no gasket) | 36.46 mm (1.435") |
| Housing with Gasket | 48.77 mm (1.920") wide x 30.18 mm (1.188") |
| Housing Material | ABS Plastic |
| Valve Material | Silicone Rubber |
| Seal Material | Silicone Gasket |
| Flow Rate | 51.55 L/min |
| WaterMark License | WM-022837 (DN40) |
| Patents | Multiple US & international patents |
Lift the existing drain grate or strainer from the drain body.
Place the Green Drain into the drain body or hub opening.
Recess 2 to 4 inches below the pipe top. The silicone gasket creates a snug seal against the pipe walls.
Put the grate back. Done. Fully sealed in under a minute.
The 1.5" drain outlet is standard in residential showers, laundry rooms, and fixture drains. The GD15 fits anywhere a DN40 connection is present.
WM-022837 (DN80)
IAPMO File 9301
Trap seal performance standard
European Technical Assessment
Food Equipment Certified
Certificate RG-04
>99.9% blockage of viral aerosols
Rapport 957187
Certified Testing Lab
Danish Plumbing Approval
California Material Safety
Drop-in install. No tools. Works from day one.
