Weather Caps | McMaster-Carr

Filter by

For Duct Diameter

Diameter

Component

Material

Mounting Location

Length

Conduit Trade Size

Fitting Connection

DFARS Specialty Metals

Exempt

Chimney Pipe Size

For System Type

Gauge

Height

Export Control Classification Number (ECCN)

EAR99

Duct Profile

Rectangular

Round

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Environment

RoHS

REACH

Conduit Type

Color

Finish

Width

Maximum Temperature

Number of Cable Routing Holes

Forward

How can we improve?

29 Products

Exhaust Pipe Vent Caps

Keep rain and debris out of vertical exhaust pipe with these caps that open with slight pressure from exhaust. They are often used on generators and other large outdoor equipment.

						Powder-Coated Steel
For Duct Dia.	Ht.	Lg.	Ga.	Fitting Connection	Color		Each
1" to 1 3/16"	3"	4 5/16"	16	Slip On	Gray	2757N11	000000
1 1/4" to 1 7/16"	3"	4 5/8"	16	Slip On	Gray	2757N12	00000
1 1/2" to 1 11/16"	3"	4 7/8"	16	Slip On	Gray	2757N13	00000
1 3/4" to 1 15/16"	3 1/4"	5 3/16"	16	Slip On	Gray	2757N14	00000
2" to 2 3/16"	3 1/4"	6 3/8"	16	Slip On	Gray	2757N15	00000

Chimney Vent Caps

Cover chimneys to reduce downdrafts and prevent obstructions from entering.

							Aluminum
	For Duct Dia.	Ht.	Dia.	Ga.	Fitting Connection	Certification		Each
For Round Duct



		2 7/8" to 4 7/8"	4 1/2"	6 5/8"	22	Press Fit	UL Listed	1803K11	000000


		4 7/8" to 6 7/8"	4 3/4"	9 1/2"	22	Press Fit	UL Listed	1803K13	00000
		6 7/8" to 8 7/8"	5 7/8"	11 5/8"	22	Press Fit	UL Listed	1803K15	000000
		8 7/8" to 10 7/8"	6 1/2"	12 3/4"	22	Press Fit	UL Listed	1803K17	000000

Gas Chimney Vent Pipe and Fittings

For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.

To join pipes and connectors, insert a male end into a female end and secure with the included locking band.

Rain Caps

				Aluminum
Chimney Pipe Size	OD	Ga.	Certification		Each



	4	4"	28	UL Listed	2117K42	000000


	5	5"	28	UL Listed	2117K43	00000
	6	6"	28	UL Listed	2117K44	00000
	7	7"	28	UL Listed	2117K45	00000
	8	8"	28	UL Listed	2117K46	00000

Weatherheads

Create a connection point to route overhead service wire and cable from utility poles to electrical meters, bringing power to buildings.

Aluminum—Made of aluminum, they resist corrosion in outdoor conditions and are lightweight for easy installation.

NEMA 3R Enclosure Rating—Protected by a rounded hood and plastic insulators in unused routing holes, these weatherheads meet NEMA 3R for protection from falling rain, sleet, snow, and dirt, as well as light splashing.

UL Listed—All meet UL safety standards for conduit, tubing, and cable fittings.

	Conduit Connection
	Conduit Trade Size	Conduit Connection	Gender	For Maximum Cable OD (Number of)	Lg.	Wd.	Ht.	Insulation Material	For Conduit Material	Includes	Enclosure Rating	Certification	Specs. Met		Each
For EMT, IMC, and RMC Conduit







				Aluminum

				1/2	Screw Clamp	Female	19/64" (4)	2 11/16"	2 1/4"	2 3/4"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N21	000000


				3/4	Screw Clamp	Female	3/8" (2), 13/32" (3)	3 1/16"	2 7/16"	2 3/4"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N19	00000
				1	Screw Clamp	Female	1/2" (3), 7/16" (2)	3 3/8"	2 3/4"	3 1/16"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N18	00000
				1 1/4	Screw Clamp	Female	5/8" (3), 7/16" (2)	4 3/16"	3 1/16"	3 1/2"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N17	00000
				1 1/2	Screw Clamp	Female	3/4" (3), 19/32" (2), 7/16" (1)	5 1/16"	3 3/4"	4 3/8"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N16	00000
				2	Screw Clamp	Female	1" (3), 3/4" (2), 17/32" (1)	6 11/16"	4 1/4"	5 7/8"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N15	00000
				2 1/2	Screw Clamp	Female	1 5/16" (3), 7/8" (3), 1" (1)	9 1/4"	6 5/16"	7"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N14	000000
				3	Screw Clamp	Female	1 5/16" (3), 7/8" (3), 1" (1)	10 15/16"	7 3/4"	7 1/4"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N13	000000
				4	Screw Clamp	Female	1 3/4" (3), 1 1/8" (4)	12 3/4"	7 3/4"	8 5/8"	Plastic	Aluminum	Set Screws	NEMA 3R	UL Listed	UL 514B	9423N11	000000

Duct Vent Caps


Wall Mount	Sloped Roof Mount

Cover wall and roof vents to prevent cold air and debris from entering your system. These caps have damper to reduce backdrafts and a screen that blocks birds from sneaking in.

Painted Steel—Strong for a long life, these caps have a black finish to prevent rust.

	For Duct						Mounting			Painted Steel
	Ht.	Wd.	Dia.	Ht.	Wd.	Lg.	Fasteners Included	Hole Dia.	Color		Each
Wall Mount







				For Rectangular Duct

				10"	3 1/4"	—	5 5/8"	12 3/4"	8 7/8"	No	3/16"	Black	6904K36	000000


				Sloped Roof Mount







								For Rectangular and Round Duct

								10"	3 1/4"	8"	6 5/8"	14 1/4"	18 3/4"	—	—	Black	6904K34	00000

High-Temperature Chimney Vent Pipe and Fittings

Built to withstand temperatures up to 1000° F, these vent pipes and fittings are for use with boilers, furnaces, stoves, and other equipment that is fired by gas, oil, wood, or coal.

To join pipes and connectors, twist a male end into a female end and secure with the included locking band.

Rain Caps

			304 Stainless Steel
Chimney Pipe Size	Ga.	Certification		Each



	6	28	UL Listed	1716K46	0000000


	8	28	UL Listed	1716K47	000000
	10	28	UL Listed	1716K48	000000

Weatherhead Kits

Create a weatherproof entry point into a building for service cables and telephone lines—these kits have all the supplies you need. The weatherhead has a rounded hood and plastic insulators in its routing holes to protect your wiring from water. The weatherhead is also lightweight, so it’s easy to install. To keep your roof watertight, the roof flashing directs water away from the point your conduit enters.

Aluminum Weatherhead—Made of aluminum, the weatherhead resists corrosion.

UL Listed—The included weatherhead, wire holders, and conduit supports meet UL safety standards for conduit, tubing, and cable fittings.

NEMA 3R Enclosure Rating—They meet NEMA 3R for protection from falling rain, sleet, snow, and dirt. They also handle light splashing from the side.

	Conduit Connection				Weatherhead
	Conduit Trade Size	Conduit Connection	Gender	For Maximum Cable OD (Number of)	Lg.	Wd.	Ht.	Insulation Material	For Conduit Material	Component (Certifications)	Includes	Enclosure Rating		Each
For EMT, IMC, and RMC Conduit







				Aluminum Weatherhead

				2	Screw Clamp	Female	1" (3), 3/4" (2), 17/32" (1)	6 3/4"	4 5/8"	6"	Plastic	Aluminum	Weatherhead (UL Listed)—E148715 Wire Holders (UL Listed)—E58921 Roof Flashing Conduit Supports (UL Listed)—E58921	Set Screws	NEMA 3R	6362N11	000000