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Green Drain GD4 waterless trap seal for 4-inch floor drains
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GD4

4" Waterless Trap Seal

Fits 4" (DN100) drain outlets. Drop-in install, no tools required.

Pipe Size 4" (102-110mm)
Flow Rate ≥340.00 L/min
Install Time 30 Seconds
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cUPC Listed
ASSE 1072 Tested
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Cutaway view of a 4-inch floor drain and its trap

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, odors, 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 4-inch drains, 102 to 110 mm, and drops in by hand. No tools, no plumber, installed in seconds.

Installs in 30 seconds. No tools.

1
Step 1: Remove the drain grate

Remove the drain grate

Lift the existing drain grate or strainer from the floor drain body.

2
Step 2: Drop in the Green Drain

Drop in the GD4

Place the Green Drain into the drain body or hub opening.

3
Step 3: Press gently to seat

Press gently to seat

Recess 2 to 4 inches below the pipe top. The silicone gasket creates a snug seal against the pipe walls.

4
Step 4: Replace the drain grate

Replace the grate

Put the grate back. Done. A full commercial floor in an afternoon.

ASSE 1072-2020 Performance Data

Independently tested by IAPMO R&T. These are lab-verified results from an accredited third-party testing laboratory.

≥340 L/min Flow Rate (Level U) No restriction to drainage.
32g Opening Force Opens with approximately 4 oz of water.
2,500+ Cycle Endurance Open/close cycles tested and passed.
>96% Evaporation Reduction Maintains trap seal without water.
For Architects & Engineers

Specify Green Drain in your next project.

Download the Revit family set for every Green Drain model, and find us listed in BSD SpecLink and MasterSpec.

Download Revit Families View full specifications →

Technical Specifications

ModelGD4
Pipe Size4" (102-110 mm) / DN100
Height51 mm
Housing Diameter (no gasket)88.39 mm (3.480"), bottom 93.47 mm (3.680")
Housing with Gasket108.56 mm (4.274") wide x 50.7 mm (1.996")
Housing MaterialABS Plastic
Valve MaterialSilicone Rubber
Seal MaterialSilicone Gasket
Flow Rate≥340.00 L/min
ASSE 1072 Opening Force32 grams
ASSE 1072 Cycle Life>2,500 cycles
ASSE 1072 Evaporation Reduction>96%
Pressure Resistance (DTI)>400 Pa
WaterMark LicenseWM-022837 (DN100)
PatentsMultiple US & international patents

Industries we serve.

Green Drain is installed across a wide range of facilities.

Healthcare K-12 Schools Universities Commercial Offices Hotels Restaurants Industrial Food Manufacturing Government Airports Senior Living Data Centers

Certifications and compliance.

Green Drain cUPC certification - IAPMO File 9301 ASSE 1072-2020

cUPC Listed

IAPMO File 9301

ASSE 1072-2020 Standard

Barrier-type trap seal performance standardEvaluated under IAPMO R&T cUPC File No. 9301

Green Drain CE Mark European Technical Assessment ETA-18/0536

CE / ETA-18/0536

European Technical Assessment

Green Drain NSF/ANSI 2 food equipment certification

NSF/ANSI 2

Food Equipment Certified

Green Drain HACCP International food safety endorsement

HACCP International

Food Safe Equipment & Materials endorsement

Green Drain WaterMark Australia certification WM-022837

WaterMark Australia

WM-022837 (DN100)

Green Drain California Proposition 65 compliant

Prop 65 Compliant

California compliance declaration

SGS

SGS Aerosol-Retention Test

Test report · retained over 99.9% of an aerosolized MS2 bacteriophage viral surrogate

Green Drain tested by Danish Technological Institute DTI

DTI Tested

Test report · Rapport 957187

Green Drain IAPMO R&T certified plumbing product

IAPMO R&T

Certified Testing Lab

Green Drain VA Godkendelse Danish plumbing approval

VA Godkendelse

Danish Plumbing Approval

View All Certifications

What operators are saying.

"4 months have gone by and I have yet to have a single complaint or concern since the Green Drains were installed."

Winston Andrews, CEO

Pleasanton Unified School District

"Once installed the Green Drain solved our issues. No more need to flush the drains or add enzymes. This product really works!"

Jeff Bowe, Project Manager

Raven Services Corporation (14-story federal complex)

"We have used the following product in all of our bathroom drains, and this has not only eliminated our odor problem, but it has made our internal customers safer."

Mike Malone

FedEx Corporation

For architects and engineers.

The GD4 is the model most commonly written into construction specifications. For CSI-format spec language, ASSE 1072-2020 performance data, and the complete certification matrix, see the Architects and Engineers technical page.

Spec Section 22 13 16
Basis of Design Green Drain GD4, IAPMO File 9301
Patents Multiple US & international patents
View A&E Resources
Technical Drawing
or Spec Sheet Preview
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Related products.

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GD3 (3")

 Green Drain GD35 waterless trap seal for 3.5-inch floor drains

GD35 (3.5")

 Green Drain GD5 waterless trap seal for 5-inch floor drains

GD5 (5")

 Green Drain GD6 waterless trap seal for 6-inch industrial drains

GD6 (6")
View All Products

Ready to protect your drains?

Drop-in install. No tools. Works from day one.

Add GD4 to Cart Request a Quote