PVC Duct Reducers | McMaster-Carr

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25 Products

Chemical-Resistant Duct and Fittings

Chemicals can eat away at most metal duct, but not this PVC system. It’s often used to exhaust corrosive gases, vapors, and fumes. Components press-fit together and secure with PVC pipe cement.

Straight Reducers

Transition between duct of different diameters. Reducers also join larger duct with smaller duct that connects to equipment.

Duct Size		ID			PVC
(A)	(B)	(A)	(B)	Color		Each



	6	4	6 5/8"	4 1/2"	Gray	0000000	0000000


	8	6	8 5/8"	6 5/8"	Gray	0000000	000000
	10	8	10 3/4"	8 5/8"	Gray	0000000	000000
	12	8	12 3/4"	8 5/8"	Gray	00000000	000000
	12	10	12 3/4"	10 3/4"	Gray	0000000	000000
	14	10	14"	10 3/4"	Gray	00000000	000000
	14	12	14"	12 3/4"	Gray	0000000	000000

Spiral Duct and Fittings

Reinforced with a continuous seam, this duct keeps its shape, even against suction from dust collection systems. On the inside, duct is smooth for efficient airflow. Because of its attractive look, spiral duct is often used for exposed heating and cooling systems.

Straight Reducers

Transition between duct of different diameters. Reducers also join larger duct with smaller duct that connects to equipment.

Chemical-Resistant PVC-Coated Steel—This duct combines the strength of steel with the chemical resistance of plastic. More economical than 304 stainless steel and stronger than PVC, it’s often used to exhaust corrosive gases, vapors, and fumes.

Duct Size		OD		Chemical-Resistant PVC-Coated Steel
(A)	(B)	(A)	(B)	Ga.		Each
5	4	4 7/8"	3 7/8"	20	00000000	000000
6	4	5 7/8"	3 7/8"	20	00000000	00000
6	5	5 7/8"	4 7/8"	20	00000000	00000
7	6	6 7/8"	5 7/8"	20	00000000	00000
8	6	7 7/8"	5 7/8"	20	00000000	00000
8	7	7 7/8"	6 7/8"	20	00000000	00000
9	8	8 7/8"	7 7/8"	20	00000000	00000
10	8	9 7/8"	7 7/8"	20	00000000	000000
10	9	9 7/8"	8 7/8"	20	00000000	000000
12	10	11 7/8"	9 7/8"	20	00000000	000000

Tee Reducers

Connect duct of different diameters to split or merge airflow.

Duct Size			OD			Chemical-Resistant PVC-Coated Steel
(A)	(B)	(C)	(A)	(B)	(C)	Ga.		Each
6	4	6	5 7/8"	3 7/8"	5 7/8"	24	00000000	000000
8	6	8	7 7/8"	5 7/8"	7 7/8"	24	00000000	000000
10	8	10	9 7/8"	7 7/8"	9 7/8"	24	00000000	000000
12	8	12	11 7/8"	7 7/8"	11 7/8"	24	00000000	000000

45° Wye Reducers

Connect duct of different diameters to split or merge airflow more gradually than tees. With less abrupt changes in direction, wyes reduce turbulence for smoother flow.

Duct Size			OD			Chemical-Resistant PVC-Coated Steel
(A)	(B)	(C)	(A)	(B)	(C)	Ga.		Each
6	4	6	5 7/8"	3 7/8"	5 7/8"	24	00000000	000000
8	6	8	7 7/8"	5 7/8"	7 7/8"	24	00000000	000000
10	8	10	9 7/8"	7 7/8"	9 7/8"	24	00000000	000000
12	10	12	11 7/8"	9 7/8"	11 7/8"	24	00000000	000000