Sink S-Traps | McMaster-Carr

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23 Products

Sink Drain Traps

Prevent sewer gas from entering your building.

Sink Drain Traps


White Polypropylene, S-Trap	Chrome-Plated Brass, S-Trap

Polypropylene—Polypropylene traps stand up to chemicals, so they’re often used for lab sinks.

S-Trap—S-traps attach to your floor drain pipe.

					S-Trap (Floor Mount)
	OD	Inlet Connection	Outlet Connection	Includes		Each
White Polypropylene


		1 1/2"	Slip Joint	Unthreaded	1 1/4" Washer Adapter, Slip-Joint Nuts and Washers	27055K82	000000

		Chrome-Plated Brass


				1 1/4"	Slip Joint	Unthreaded	Slip-Joint Nuts and Washers	2967K33	00000
				1 1/2"	Slip Joint	Unthreaded	Slip-Joint Nuts and Washers	2967K37	00000

Sink Drain Traps with Cleanout Plug

Chrome-Plated

Brass, S-Trap

S-Trap—S-traps attach to your floor drain pipe.

					S-Trap (Floor Mount)
	OD	Inlet Connection	Outlet Connection	Includes		Each
Chrome-Plated Brass


		1 1/4"	Slip Joint	Unthreaded	Slip-Joint Nuts and Washers	2967K35	000000
		1 1/2"	Slip Joint	Unthreaded	Slip-Joint Nuts and Washers	2967K36	00000

Sink Drain Trap Extension Tubing

Use these extensions to help connect drain tailpieces to drain traps.

Slip-Joint Inlet Connection × Unthreaded Pipe Outlet Connection

Image of Product. Back orientation. Sink Drain Trap Extension Tubing. Slip-Joint Inlet Connection, Unthreaded Outlet Connection.

Polypropylene—Polypropylene tubing stands up to chemicals, so it’s often used for lab sinks.

	Lg.		Each
White Polypropylene


	1 1/4"	12"	2965K52	00000
	1 1/2"	12"	2965K53	0000

Threaded Pipe Inlet Connection × Threaded Pipe Outlet Connection

			Inlet			Outlet
	OD	Lg.	Thread Size	Thread Type	Gender	Thread Size	Thread Type	Gender		Each
Chrome-Plated Brass


		1 1/4"	12"	1 1/4"-27	UNS	Male	1 1/4"-27	UNS	Male	6437N12	000000
		1 1/2"	12"	1 1/2"-27	UNS	Male	1 1/2"-27	UNS	Male	6437N13	00000

Threaded Pipe Inlet Connection × Unthreaded Pipe Outlet Connection

			Inlet
	OD	Lg.	Thread Size	Thread Type	Gender		Each
Chrome-Plated Brass


		1 1/4"	6"	1 1/4"-27	UNS	Male	2965K51	000000
		1 1/4"	12"	1 1/4"-27	UNS	Male	6437N11	00000

Unthreaded Pipe Inlet Connection × Unthreaded Pipe Outlet Connection

Image of Product. Front orientation. Sink Drain Trap Extension Tubing. Unthreaded Inlet Connection, Unthreaded Outlet Connection.

	Lg.		Each
Chrome-Plated Brass


	1 1/4"	12"	2665K44	000000
	1 1/2"	12"	2665K45	00000

Adjustable-Neck Sink Drain Traps


1 Inlet P-Trap or S-Trap—White EPDM	2 Inlets P-Trap or S-Trap—White EPDM

Connect sink drains that are offset from wall drain outlets.

1 Inlet—1-inlet drain traps can attach to either a 1 _1/2" or 1 _1/4" tailpiece to fit your sink drain.

EPDM—EPDM rubber traps are flexible, so you can form them into a P-trap or S-trap. They’re soft enough to squeeze with your hands to manually remove clogs. Use scissors to trim these traps to length, then attach them to your drain and wall pipe with the included fittings.

Tee Connector—Drain traps with a tee connector have a dishwasher drain connector. To attach a dishwasher drain hose, knock out the plug in the tee connector.

		Max. Adjustment
	OD	Horizontal	Vertical	Inlet Connection	Outlet Connection	Includes		Each
1 Inlet





				P-Trap or S-Trap—White EPDM
				1 1/2"	12"	20"	Slip Joint	Slip Joint	1 1/4" Washer Outlet Adapter, Slip-Joint Nuts and Washers, Worm-Drive Clamps	3097K201	000000

				2 Inlets





								P-Trap or S-Trap—White EPDM
								1 1/2"	16"	24"	Slip Joint	Slip Joint	Slip-Joint Nuts and Washers, Tee Connector, Worm-Drive Clamps	3097K202	00000

Sediment Traps


Removable Basket

Prevent drain blockage—these traps have a reusable basket to catch debris, such as metal chips and stones, before it enters your sewage system. For quick disposal, unthread the thumb screws by hand to access and remove the reusable basket. When the tank is closed, a gasket seals in odors.

Install these traps under your sink as a P-trap replacement. The tank and basket are made of polypropylene, so they resist acids and other chemicals.

	Outlet Pipe Size	Outlet Ht.	Ht.	Wd.	Dp.	Gasket Material	Max. Temp., ° F	Features		Each
Threaded NPT Male Inlet and Outlet





	Polypropylene
	2	1 1/2	8"	1 1/2	8"	11 1/4"	8"	8"	Buna-N	230	Removable Basket, Clamps with Thumbscrews	6371N11	0000000
	5	1 1/2	9"	1 1/2	9"	12 1/2"	13"	13"	Buna-N	230	Removable Basket, Clamps with Thumbscrews	6371N12	000000

Sediment Traps for Natural Gas

Get ahead of your water heater maintenance—these traps catch debris from natural gas lines before it can enter the tank. Also called a drip leg, these traps are often required by building standards. They’re plated in zinc, so they’re mildly corrosion resistant.

Install them after your shutoff valve and as close to the water heater inlet as possible. To empty the trap, unscrew the cap and dispose of any debris.

	Outlet Ht.	Ht.	Wd.	Dp.	Max. Temp., ° F	Features		Each
Threaded NPT Male Inlet and Outlet





	Zinc-Plated Carbon Steel
	3	1/2	1/2	4"	7 3/4"	4 1/4"	1 1/4"	600	Threaded Drain Cap	6551N11	000000
	3	3/4	3/4	4"	7 3/4"	4 1/4"	1 1/4"	600	Threaded Drain Cap	6551N12	00000

Neutralization Tanks


Style A	Style B	Style C

For safe and legal disposal of corrosive chemicals, these tanks neutralize acid waste before it drains into sewer systems. Fill them with limestone chips (sold separately), which chemically react with waste to reduce its acidity. Often used in labs, these tanks rest on a solid surface below your sink. The inlet attaches to your sink drain where a P-trap would go, and the outlet threads into your drain pipe. These tanks are made of polyethylene to withstand prolonged contact with harsh chemicals.

Choosing a tank size involves several factors, including how much waste you generate and the types of chemicals you plan to treat. For effective neutralization, waste should spend three hours in your tank before exiting via gravity flow. Select a tank that is greater in size than the volume of chemicals you plan to dispose of in a three-hour period.

Styles A and B—Style A and B tanks have larger capacities to process greater amounts of waste.

Style C—Style C tanks have an adjustable-height inlet with a slip joint fitting to connect to sink drains.

									Inlet			Outlet
	Style	Cap., gal.	Dia.	Wd.	Dp.	Ht.	Color	Clarity	ID	Pipe Size	Ht.	Pipe Size	Ht.	Includes		Each
Polyethylene





				Threaded NPT Female Inlet × NPT Male Outlet
				A	5	—	14"	6"	18 3/4"	White	Opaque	—	1 1/2	21"	1 1/2	15"	Removable Cap	6327N12	0000000
				B	6	11 3/4"	—	—	18 3/4"	Black	Opaque	—	1 1/2	18 1/2"	1 1/2	12 1/2"	Removable Cap	6327N13	000000



						Slip Joint Inlet × NPT Male Outlet
						C	3	—	12"	6 1/2"	12 3/4"	White	Opaque	1 1/2"	—	14 1/2" to 23 1/2"	1 1/2	9 1/2"	Removable Cap	6327N11	000000

Limestone Chips

Before use, fill your tank up to the outlet with limestone chips. One 50-lb. bag of chips will fill a five-gallon tank. Schedule regular maintenance to clean your tank and check the chip level—neutralization will erode chips over time. Disposing of non-chemical waste, such as coffee grounds, into these tanks will make the limestone chips less effective.

Container Net Wt., lb.	Container Type		Each
50	Bag	6327N14	000000