FM Approved Pipe Caps | McMaster-Carr

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44 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

FM-Approved Low-Pressure Cast Iron Threaded Pipe Fittings

Suitable for use in fire-protection applications, these pipe fittings are made of cast iron, so they are brittle and can be quickly opened with the strike of a sledge hammer. They are also known as Pressure Class 125 fittings. Use in noncorrosive environments.

Plugs with Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class: 125
Specifications Met: FM Approved, UL Listed, ASTM A126, ASME B1.20.1, ASME B16.4
Pipe Nipples and Pipe: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K105	000000
1 1/4	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K106	00000
1 1/2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K107	00000
2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K108	00000
2 1/2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K109	00000
3	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K111	00000
4	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K112	000000

Plugs with External Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class: 125
Specifications Met: FM Approved, UL Listed, ASTM A126, ASME B1.20.1, ASME B16.4
Pipe Nipples and Pipe: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K113	00000
1 1/4	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K114	0000
1 1/2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K115	0000
2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K116	00000
2 1/2	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K117	00000
3	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K118	00000
4	Solid	175 psi @ 72° F	125 psi @ 350° F	Iron	68115K119	00000

FM-Approved Low-Pressure Cast Iron Unthreaded Pipe Flanges

Front

Flat Surface on Back

For Use With: Air, Diesel Fuel, Gasoline, Natural Gas, Oil, Steam, Water
Pressure Class: 125
Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
Pipe Nipples and Pipe: Use Schedule 40 steel
Fittings: Use Class 125 or 150 iron and steel

FM-approved for fire protection applications, these flanges are cast iron, so they're brittle and can be quickly opened by hitting them with a sledge hammer. Bolt them together with a gasket (not included) to create an access point within a low-pressure pipe line. All are cap flanges, which are also known as blind flanges. Use them in noncorrosive environments.

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure		Each
1	4 1/4"	1/2"	5/8"	4	3 1/8"	200 psi @ 72° F	165 psi @ 300° F	4824N11	000000
1 1/2	5"	1/2"	5/8"	4	3 7/8"	200 psi @ 72° F	165 psi @ 300° F	4824N12	00000
2	6"	5/8"	3/4"	4	4 3/4"	200 psi @ 72° F	165 psi @ 300° F	4824N13	00000
2 1/2	7"	5/8"	3/4"	4	5 1/2"	200 psi @ 72° F	165 psi @ 300° F	4824N14	00000
3	7 1/2"	5/8"	3/4"	4	6"	200 psi @ 72° F	165 psi @ 300° F	4824N15	00000
3 1/2	8 1/2"	5/8"	3/4"	8	7"	200 psi @ 72° F	165 psi @ 300° F	4824N16	000000
4	9"	5/8"	3/4"	8	7 1/2"	200 psi @ 72° F	165 psi @ 300° F	4824N17	000000
6	11"	3/4"	7/8"	8	9 1/2"	200 psi @ 72° F	165 psi @ 300° F	4824N18	000000

Grooved-End Iron Pipe Fittings

The grooved ends on these fittings connect to pipe with a clamp to easily install piping systems. Since there’s no heat or threading required, they provide quick access to a pipe line for routine maintenance. Fittings are also known as Victaulic fittings. They are for use in noncorrosive applications.

Caps

For Use With: Air, Water
Temperature Range: -30° to 250° F
Specifications Met: UL Listed, FM Approved, ASTM A536

Pipe Size	Max. Pressure	Color	Material		Each
2	750 psi @ 72° F	Orange	Enamel-Coated Ductile Iron	5723T17	000000
2 1/2	750 psi @ 72° F	Orange	Enamel-Coated Ductile Iron	5723T444	00000
3	750 psi @ 72° F	Orange	Enamel-Coated Ductile Iron	5723T18	00000
4	750 psi @ 72° F	Orange	Enamel-Coated Ductile Iron	5723T19	00000
6	750 psi @ 72° F	Orange	Enamel-Coated Ductile Iron	5723T445	000000

Press-Connect Fittings for Copper Tubing

For Use With: Drinking Water
Maximum Pressure: Fittings compatible with Viega ProPress or Viega ProPress XL-C: 200 psi @ 72° F
Fittings compatible with Viega Pex or Viega PureFlow Press: 100 psi @ 72° F
Temperature Range: 0° to 250° F
Tubing: Fittings compatible with Viega ProPress or Viega ProPress XL-C: Use with K, M, L copper
Fittings compatible with Viega Pex or Viega PureFlow Press: Use with hard polyethylene plastic
Specifications Met: See table

Crimp these fittings to copper tubing with a crimping tool (sold separately). An O-ring on the inside of the fitting creates a leak-tight connection that doesn’t require heat or soldering. They are comparable to Viega ProPress fittings. Fittings have good corrosion resistance. They meet NSF/ANSI safety standards for use with drinking water systems.

Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.

Caps

Copper Tube Size	For Tube OD	Lg.	Material	Compatible With	Specifications Met		Each
1/2	5/8"	59/64"	Copper	Viega ProPress	ASME B16.51, FM Approved, NSF/ANSI 61	1747N45	00000
3/4	7/8"	1 1/16"	Copper	Viega ProPress	ASME B16.51, FM Approved, NSF/ANSI 61	1747N46	00000
1	1 1/8"	1 7/64"	Copper	Viega ProPress	ASME B16.51, FM Approved, NSF/ANSI 61	1747N47	00000
1 1/4	1 3/8"	1 5/16"	Copper	Viega ProPress	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N103	00000
1 1/2	1 5/8"	1 5/8"	Copper	Viega ProPress	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N105	00000
2	2 1/8"	1 13/16"	Copper	Viega ProPress	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N139	00000
2 1/2	2 5/8"	2 7/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N413	000000
3	3 1/8"	2 23/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N543	000000
4	4 1/8"	2 49/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61	1747N721	000000

Replacement O-Rings

For Copper Tube Size	For Tube OD	O-Ring Material	Compatible With		Each
1/2	5/8"	EPDM Rubber	Viega ProPress	1747N58	00000
3/4	7/8"	EPDM Rubber	Viega ProPress	1747N59	0000
1	1 1/8"	EPDM Rubber	Viega ProPress	1747N61	0000
1 1/4	1 3/8"	EPDM Rubber	Viega ProPress	1747N819	0000
1 1/2	1 5/8"	EPDM Rubber	Viega ProPress	1747N847	0000
2	2 1/8"	EPDM Rubber	Viega ProPress	1747N979	0000

Crimping Tools with Six Jaws

Jaws for copper tube sizes ½ to 2 fit directly into the included crimping tool.

			Battery
For Copper Tube Size	For Tube OD	Voltage	No. Included	Cap., amp-hrs.	Battery Charger Included	Battery Charging Time, min.	Compatible With	Specifications Met		Each
1/2, 3/4, 1, 1 1/4, 1 1/2, 2	5/8", 7/8", 1 1/8", 1 3/8", 1 5/8", 2 1/8"	18V DC	2	3	Yes	39	Viega ProPress	EMC 2011/65/EU, EMC 2014/30/EU, IEC 62841-1, UL 62841-1	2233N328	000000000

Crimping Rings

Rings for copper tube sizes 2 ½ to 4 include a jaw actuator. Clip the rings around the fitting and use the jaw actuator and crimping tool (sold separately) to press the open ends together.

For Copper Tube Size	For Tube OD	Includes	Compatible With		Each
2 1/2, 3, 4	2 5/8", 3 1/8", 4 1/8"	Three Rings (2 1/2-4 Copper Tube Size) One Ring Actuator Jaw	Viega ProPress XL-C	2233N658	000000000