Steel Gas Vents | McMaster-Carr

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86 Products

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.

Pipes

									Galvanized Steel
	Chimney Pipe Size	Female ID	Male OD	Lg.	Ga.	Construction	Inner Wall Material	Certification		Each
Female × Male



		4	4"	4 1/2"	18"	28	Double Wall	Aluminum	UL Listed	2117K12	000000


		5	5"	5 1/2"	18"	28	Double Wall	Aluminum	UL Listed	2117K13	00000
		6	6"	6 1/2"	18"	28	Double Wall	Aluminum	UL Listed	2117K14	00000
		7	7"	8"	18"	28	Double Wall	Aluminum	UL Listed	2117K15	00000
		8	8"	9"	18"	28	Double Wall	Aluminum	UL Listed	2117K16	00000

Adjustable-Angle Connectors, 45° Elbow to Straight

Image of Product. Front orientation. Chimney Pipe and Fittings. Gas Chimney Vent Pipe and Fittings, Adjustable-Angle Connectors, 45° Elbow to Straight.

Adjustable-angle elbow connectors can be used at an angle or straight.

								Galvanized Steel
	Chimney Pipe Size	Female ID	Male OD	Ga.	Construction	Inner Wall Material	Certification		Each
Female × Male



		7	7"	8"	28	Double Wall	Aluminum	UL Listed	2117K25	000000


		8	8"	9"	28	Double Wall	Aluminum	UL Listed	2117K26	00000

Adjustable-Angle Connectors, 60° Elbow to Straight

Image of Product. Front orientation. Chimney Pipe and Fittings. Gas Chimney Vent Pipe and Fittings, Adjustable-Angle Connectors, 60° Elbow to Straight.

Adjustable-angle elbow connectors can be used at an angle or straight.

								Galvanized Steel
	Chimney Pipe Size	Female ID	Male OD	Ga.	Construction	Inner Wall Material	Certification		Each
Female × Male



		4	4"	4 1/2"	28	Double Wall	Aluminum	UL Listed	2117K27	000000


		5	5"	5 1/2"	28	Double Wall	Aluminum	UL Listed	2117K28	00000
		6	6"	6 1/2"	28	Double Wall	Aluminum	UL Listed	2117K29	00000

Tee Connectors

								Galvanized Steel
	Chimney Pipe Size	Female ID	Male OD	Ga.	Construction	Inner Wall Material	Certification		Each
Female × Female × Male



		4	4"	4 1/2"	28	Double Wall	Aluminum	UL Listed	2117K32	000000


		5	5"	5 1/2"	28	Double Wall	Aluminum	UL Listed	2117K33	00000
		6	6"	6 1/2"	28	Double Wall	Aluminum	UL Listed	2117K34	00000
		8	8"	9"	28	Double Wall	Aluminum	UL Listed	2117K36	000000

Roof Flashings

Roof flashing requires a storm collar (sold separately).

				Steel
Chimney Pipe Size	ID	For Max. Roof Pitch	Ga.		Each



	4	4 1/2"	6/12	28	2117K52	000000


	5	5 1/2"	6/12	28	2117K53	00000
	6	6 1/2"	6/12	28	2117K54	00000
	7	8"	6/12	28	2117K55	00000
	8	9"	6/12	28	2117K56	00000

Storm Collars

			Steel
Chimney Pipe Size	ID	Ga.		Each



	4	4 1/2"	28	2117K62	00000


	5	5 1/2"	28	2117K63	00000
	6	6 1/2"	28	2117K64	00000
	7	8"	28	2117K65	00000
	8	9"	28	2117K66	00000

Breather Vents


Style A	Style D	Style E

Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.

Splash Guard—Breather vents with splash guard are good for containers that are often filled and drained; they have a guard that prevents oil from splashing out of the vent hole.

	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp., ° F	Ht.	For Use With	Removes Particle Size Down To, μm	Features		Each
NPT Male







			Zinc-Plated Steel Body and Fitting

			A	2	1,095 scfm @ 100 psi	150 psi	300	1 5/8"	Air, Inert Gas	90	—	9833K16	000000


			D	1/8	Not Rated	Not Rated	225	1"	Air, Inert Gas, Oil, Water	40	—	2257K11	00000
			D	1/4	Not Rated	Not Rated	225	1"	Air, Inert Gas, Oil, Water	40	—	2257K12	00000
			D	3/8	Not Rated	Not Rated	225	1 1/16"	Air, Inert Gas, Oil, Water	40	—	2257K13	00000
			D	1/2	Not Rated	Not Rated	225	1 3/16"	Air, Inert Gas, Oil, Water	40	—	2257K14	00000
			D	3/4	Not Rated	Not Rated	225	1 1/4"	Air, Inert Gas, Oil, Water	40	—	2257K15	00000
			E	1/8	Not Rated	Not Rated	225	1 3/16"	Air, Inert Gas, Oil, Water	40	Splash Guard	2257K31	00000
			E	1/4	Not Rated	Not Rated	225	1 3/16"	Air, Inert Gas, Oil, Water	40	Splash Guard	2257K32	00000
			E	3/8	Not Rated	Not Rated	225	1 1/4"	Air, Inert Gas, Oil, Water	40	Splash Guard	2257K33	00000
			E	1/2	Not Rated	Not Rated	225	1 5/16"	Air, Inert Gas, Oil, Water	40	Splash Guard	2257K34	00000
			E	3/4	Not Rated	Not Rated	225	1 3/8"	Air, Inert Gas, Oil, Water	40	Splash Guard	2257K35	00000




					Nickel-Plated Steel Body and Fitting

					A	1/8	2 scfm @ 100 psi	150 psi	300	7/16"	Air, Inert Gas	40	—	9833K21	0000


					A	1/4	3 scfm @ 100 psi	150 psi	300	5/8"	Air, Inert Gas	40	—	9833K22	0000
					A	3/8	7 scfm @ 100 psi	150 psi	300	3/4"	Air, Inert Gas	40	—	9833K23	0000
					A	1/2	17 scfm @ 100 psi	150 psi	300	7/8"	Air, Inert Gas	40	—	9833K11	0000
					A	3/4	20 scfm @ 100 psi	150 psi	300	1"	Air, Inert Gas	40	—	9833K12	0000
					A	1	28 scfm @ 100 psi	150 psi	300	1 5/16"	Air, Inert Gas	40	—	9833K13	0000
					A	1 1/4	50 scfm @ 100 psi	150 psi	300	1 7/16"	Air, Inert Gas	40	—	9833K14	00000
					A	1 1/2	73 scfm @ 100 psi	150 psi	300	1 1/2"	Air, Inert Gas	40	—	9833K15	00000


					BSPT Male







									Zinc-Plated Steel Body and Fitting

									A	1/8	26 scfm @ 100 psi	150 psi	300	7/16"	Air, Inert Gas	90	—	9847K11	0000


									A	1/4	35 scfm @ 100 psi	150 psi	300	11/16"	Air, Inert Gas	90	—	9847K12	0000
									A	3/8	87 scfm @ 100 psi	150 psi	300	13/16"	Air, Inert Gas	90	—	9847K13	0000
									A	1/2	131 scfm @ 100 psi	150 psi	300	1"	Air, Inert Gas	90	—	9847K14	0000
									A	3/4	219 scfm @ 100 psi	150 psi	300	1 1/16"	Air, Inert Gas	90	—	9847K15	0000


									NPSM Female







											Zinc-Plated Steel Body and Fitting

	F										1/8	26 scfm @ 100 psi	150 psi	300	5/8"	Air, Inert Gas	90	—	9833K24	0000


	F	1/4									35 scfm @ 100 psi	150 psi	300	3/4"	Air, Inert Gas	90	—	9833K25	0000
	F	3/8									87 scfm @ 100 psi	150 psi	300	15/16"	Air, Inert Gas	90	—	9833K26	0000
	F	1/2									131 scfm @ 100 psi	150 psi	300	1"	Air, Inert Gas	90	—	9833K27	0000

Weather Resistant Breather Vents


Threaded NPT Male, Style A	Slip On Female Style C

Shield outdoor pipe and tank openings from the environment. Also known as vent caps, these breather vents have screens to allow air flow while blocking debris. Use them to prevent excess vacuum and pressure in your equipment.

Threaded NPT Male

Style A

									Screen
	Style	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp.	Ht.	Dia.	For Use With	Material	Construction	Mesh Size	Removes Particle Size Down To, μm		Each
Zinc-Plated Steel Body and Fitting



		A	3/8	Not Rated	Not Rated	Not Rated	1 1/4"	1 1/4"	Air	304 Stainless Steel	Wire Mesh	100 × 100	140	36635K38	000000


		A	1/2	Not Rated	Not Rated	Not Rated	1 7/16"	1 1/4"	Air	304 Stainless Steel	Wire Mesh	100 × 100	140	36635K39	00000

Slip On Female

Style C

Style C—Style C has a set screw to secure in place.

									Screen
	Style	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp.	Ht.	Dia.	For Use With	Material	Construction	Screen Opening Size	Features		Each
Zinc-Plated Steel Body and Fitting



		C	1	Not Rated	Not Rated	Not Rated	1 1/2"	2 1/2"	Air	Steel	Perforated	1/8"	Set Screw	36635K51	00000


		C	1 1/4	Not Rated	Not Rated	Not Rated	1 1/2"	2 1/2"	Air	Steel	Perforated	1/8"	Set Screw	36635K52	0000
		C	1 1/2	Not Rated	Not Rated	Not Rated	1 3/4"	2 3/4"	Air	Steel	Perforated	1/8"	Set Screw	36635K53	0000
		C	2	Not Rated	Not Rated	Not Rated	2 3/4"	4"	Air	Steel	Perforated	1/8"	Set Screw	36635K54	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.

Roof Flashings

				Aluminum Zinc Alloy-Coated Steel
Chimney Pipe Size	For Max. Roof Pitch	Ga.	Includes		Each



	6	6/12	28	Storm Collar	1716K711	0000000


	8	6/12	28	Storm Collar	1716K8	000000
	10	6/12	28	Storm Collar	1716K9	000000

Storm Collars

		Aluminum Zinc Alloy-Coated Steel
Chimney Pipe Size	Ga.		Each



	6	28	1716K96	000000


	8	28	1716K97	00000
	10	28	1716K98	00000

Breather Vents with Cap


Style A	Style C	Replacement Screen

Add a filling port to your hydraulic tank while protecting against excess pressure and vacuum. Breather vents stop debris from entering your tank. Mount them on top of standard tank openings with included hardware.

Style A


	Replacement Screen

	Vents												Replacement Screens
	For Opening Dia.	Max. Flow Rate, gpm	Max. Temp., ° F	Ht.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each		Each
Steel Body







				304 Stainless Steel Cap

				2 1/8"	20	220	5"	Air, Oil	304 Stainless Steel	Flange	6	Yes	40	4473K21	000000	4473K32	000000




						Steel Cap

						2 1/8"	192	250	5 1/8"	Air, Oil	304 Stainless Steel	Flange	6	Yes	40	4473K22	00000	4473K33	0000

Style C


	Replacement Screen

	Vents												Replacement Screens
	For Opening Dia.	Max. Flow Rate, gpm	Max. Temp.	Ht.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each		Each
Steel Body







				304 Stainless Steel Cap

				2 1/8"	20	220° F	5 3/4"	Air, Oil	Nylon	Flange	6	Yes	40	4473K14	000000	4473K31	000000




						Steel Cap

						2 1/8"	115	Not Rated	5 1/8"	Air, Oil	304 Stainless Steel	Flange	6	Yes	10	4473K152	00000	4473K33	0000


						2 1/8"	115	Not Rated	6 1/8"	Air, Oil	Nylon	Flange	6	Yes	10	4473K151	00000	4473K149	0000
						2 1/8"	190	150° F	6 1/8"	Air, Oil	Nylon	Flange	6	Yes	40	4473K53	00000	4473K149	0000

Lockable Breather Vents with Cap

Secure access to vented openings in pipe and tanks—the cap can be locked to prevent tampering. These breather vents allow you to add a filling port to your hydraulic tank while protecting against excess pressure and vacuum. Use them to stop debris from entering your tank. Breather vents mount on top of standard tank openings with included hardware. Padlock is not included.

Flange Mount


Steel with 304 Stainless Steel Screen	Steel with Nylon Plastic Screen

	Max. Pressure	Ht.	For Use With	Cap Material	Screen Material	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm	For Max. Padlock Shackle Dia.		Each
Steel Body



	2 1/8"	Not Rated	5 1/8"	Air, Oil	Steel	304 Stainless Steel	6	Yes	10	3/8"	3853N13	000000


	2 1/8"	Not Rated	5 1/8"	Air, Oil	Steel	304 Stainless Steel	6	Yes	40	3/8"	4473K45	00000
	2 1/8"	Not Rated	6 1/8"	Air, Oil	Steel	Nylon	6	Yes	10	3/8"	3853N12	00000
	2 1/8"	Not Rated	6 1/8"	Air, Oil	Steel	Nylon	6	Yes	40	3/8"	3853N11	00000

Moisture Absorbing Breather Vents

Keep moisture, dirt, and debris from entering your oil reservoirs. The silica gel inside these breather vents absorbs moisture from the air, preventing rust from forming inside your tanks. The gel changes from blue to pink as it becomes saturated, letting you know it needs to be replaced. A second filter blocks dust and other particles from getting inside. These breather vents allow air to flow in and out of your lubrication system, keeping excess vacuum or pressure from building up in cylinders, gear boxes, and tanks.

Steel Body—NPT Male


	Repair Kits

For an extended service life, use breather vents with a steel body. They are stronger than breather vents with plastic bodies and hold up better when exposed to chemicals. A window lets you check the color of the gel.

Repair Kits—No need to replace the entire unit when the gel is saturated—use rebuild kits to add fresh gel and to replace the window, filters, and gaskets.

	Vents										Repair Kits
	Pipe Size	For Tank Cap., gal.	Max. Flow Rate @ Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm		Each		Each
Steel Body



		2	1 to 800	85 scfm @ 1 psi	220	11 1/2"	10 1/8"	Air	1	3297T77	000000000	3297T771	0000000


		2	1 to 1,300	85 scfm @ 1 psi	220	13 3/4"	10 1/8"	Air	1	3297T78	00000000	3297T781	000000
		2	1 to 2,400	80 scfm @ 1 psi	220	18 1/4"	10 1/8"	Air	1	3297T79	00000000	3297T791	000000
		3	1 to 4,000	205 scfm @ 1 psi	220	19 1/4"	15 1/2"	Air	1	3297T81	00000000	3297T811	000000