Green Drain GD2 waterless trap seal for 2-inch floor drains

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GD2

2" Waterless Trap Seal

Name: GD2 - 2" Waterless Trap Seal
Brand: Green Drain
SKU: GD2
Price: 51.55 AUD
Availability: InStock

Fits 2" (51-59 mm) drain outlets. Drop-in install, no tools required.

$51.55 AUD

Inc. GST. Free shipping on orders over $100 AUD. $10 flat rate standard shipping.

Pipe Size 2" (51-59mm)

Flow Rate 82.50 L/min

Install Time 30 Seconds

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Will it fit? Measure the pipe opening under the cover, inside wall to inside wall.

Watch how to measure Size chart

Measuring keychain $6.95 AUDA cutout for every size, so you order the right one.

Size chart

Measure the pipe opening inside wall to inside wall, then find the row your reading falls in. Go by the millimeters: the inch size is only the pipe’s name.

Model	Pipe opening	Size
GD125	32 to 38 mm	1.25"
GD15	39 to 47 mm	1.5"
GD2 this page	51 to 59 mm	2"
GD25	55 to 65 mm	2.5"
GD3	68 to 81 mm	3"
GD35	89 to 95 mm	3.5"
GD4	99 to 107 mm	4"
GD5	125 to 133 mm	5"
GD6	149 to 157 mm	6"
Hybrid models, for openings between the sizes above
GD3/35	77 to 95 mm	3 to 3.5"
GD35/4	89 to 108 mm	3.5 to 4"

Full measuring guide

WaterMark Certified

ASSE 1072 Tested

Free Shipping Over $100

For hospitals and clinics: GD-MD, the medical version of this size.

Cutaway view of a 2-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, 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 2-inch drains, 51 to 59 mm, and drops in by hand. No tools, no plumber, installed in seconds.

Will it fit? Measure first

Measure the pipe. Not the grate, not the bowl.

Lift the grate. At the bottom of the drain body is a round pipe opening. Measured across its center from inside wall to inside wall, that is the only number that matters. The GD2 seats in a pipe of 51 to 59 mm (2 in.). If the opening is oval, use the smaller reading. Outside that range, another size fits: see all sizes.

Drain in section with the grate highlighted: not the part to measure

Don't measure the grate

The grate is the cover you walk on. It sits on top of the drain body and is wider than the pipe underneath, so its width tells you nothing about fit.

Drain in section with the bowl highlighted: not the part to measure

Don't measure the bowl

The bowl is the basin under the grate that funnels water down. It is wider than the pipe too. The Green Drain does not sit here.

Drain in section with the pipe highlighted: the part to measure

Measure the pipe

At the bottom of the bowl is the round pipe opening. This is where the Green Drain seats, so this is the width to measure. Wipe it clean, then measure inside wall to inside wall.

Floor drain from above with the grate off: a tape across the pipe opening from A to B — **Measure A to B.** The pipe opening at the bottom of the bowl.

Full installation guide: how to measure, choose a size and install.

Common drains it fits

GD2 installed in a round floor drain — Round

GD2 installed in a square floor drain — Square

GD2 installed in a linear shower drain — Linear shower

Not seeing your drain? If its outlet is a round pipe in the GD2's range, it fits. The cover on top does not matter; the pipe under it does. Remove any basket or strainer first.

GD2 in section with water flowing down through the open skirt — **Water flowing.** The silicone skirt opens and water passes.

GD2 in section with the skirt closed and sewer gas held below — **Flow stopped.** The skirt closes. Air, odor and insects stay below.

The valve, two states

One-way. Opens for water going down, closes when the flow stops. No water to top up, no power, nothing to prime.

Inspect the seal around 6 to 12 months in service and replace only as needed.

Installs in 30 seconds. No tools.

Step 1: the grate lifted off a floor drain, shown in section

Lift the grate

Most grates lift straight out by hand. Some are held by one center screw; back it out, then lift.

Step 2: measuring the pipe opening at the bottom of the drain, inside wall to inside wall

Measure the opening

Measure the pipe opening at the bottom of the bowl, inside wall to inside wall. The GD2 fits 51 to 59 mm (2 in.).

Step 3: the GD2 being pressed down into the pipe opening

Press it in

Push the Green Drain into the pipe by hand until it sits 50 to 100 mm (2 to 4 in.) below the top of the pipe. The silicone gasket creates a snug seal against the pipe walls.

Step 4: the grate back in place over the seated GD2

Replace the grate

Put the grate back. Done. Nothing to wire, prime or top up, and a full commercial floor takes an afternoon. Lifts out by hand, or with the extraction tool.

For Architects & Engineers

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Technical Specifications

Model	GD2
Pipe Size	2" (51-59 mm)
Height	33 mm
Housing Diameter (no gasket)	42.66 mm (1.680")
Housing with Gasket	60.55 mm (2.384") wide x 32.7 mm (1.287")
Housing Material	ABS Plastic
Valve Material	Silicone Rubber
Seal Material	Silicone Gasket
Flow Rate	82.50 L/min
Pressure Resistance (DTI)	661 Pa
WaterMark License	WM-022837 (DN50)
Patents	Multiple US & international patents

Industries we serve.

Green Drain is installed across a wide range of facilities.

Residential Schools & Universities Offices & Commercial Hotels & Hospitality Healthcare Property Management Pest Control

Certifications and compliance.

Green Drain holds six product certifications (cUPC, WaterMark, NSF/ANSI 2, CE / ETA-18/0536, Saber, and HACCP International). The remaining items below are independent test reports and regional approvals.