1 1/4 Check Valves | McMaster-Carr

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40 Products

High-Flow Threaded Check Valves

To achieve the maximum possible flow, internal components are designed to reduce flow resistance. These valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.

Bronze Body


	Repair Kit for 125 Pressure Class	Repair Kit for 200 and 300 Pressure Classes

Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

Repair Kits—Repair kits include everything you need to rebuild the valve.

	Check Valves															Repair Kits
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each	For Pressure Class	For Pipe Size		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 125



		1 1/4	54	200 psi @ 150° F	125 psi @ 353° F	0.5	-20 to 405	3 9/16"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	4708K56	0000000	125	1 1/4	4708K23	000000


		NPT Female Inlet × NPT Female Outlet—Pressure Class 150



				1 1/4	39	300 psi @ 150° F	150 psi @ 366° F	0.5	-20 to 405	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Brass	Brass	9773K56	000000	—	—	———	0


				NPT Female Inlet × NPT Female Outlet—Pressure Class 200



						1 1/4	39	400 psi @ 150° F	200 psi @ 388° F	0.5	-20 to 550	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K66	000000	200, 300	1 1/4	9770K113	000000


						NPT Female Inlet × NPT Female Outlet—Pressure Class 300



								1 1/4	39	600 psi @ 150° F	300 psi @ 422° F	0.5	-20 to 550	4 3/8"	Horizontal, Vertical	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	9770K76	000000	200, 300	1 1/4	9770K113	000000

316 Stainless Steel Body

316 stainless steel valves are more corrosion resistant than bronze valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	For Use With	Disc Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class Not Rated



	1 1/4	189	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 1/8"	Horizontal, Vertical	Removable Cap	Air, Steam, Water	316 Stainless Steel	PTFE	46635K67	0000000

Threaded Check Valves

These valves open to allow flow in one direction and close when flow stops or reverses.

Connectors, NPT Female Inlet × NPT Female Outlet


Female Inlet × Female Outlet	Flared Angle Connector

Nickel-Plated Brass Body—Nickel-plated brass valves are more corrosion resistant than plain brass or bronze valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Spring Material	Seal Material	End-to-End Lg.	For Use With		Each
Brass Body—Buna-N Spring-Loaded Piston



	1 1/4	17	400 psi @ 70° F	—	2	35 to 225	302 Stainless Steel	Buna-N	4 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon	7746K842	000000


	Brass Body—304 Stainless Steel Spring-Loaded Piston



			1 1/4	20	400 psi @ 70° F	125 psi @ 350° F	2	35 to 350	302 Stainless Steel	303 Stainless Steel	4 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon	4753K45	000000


			Nickel-Plated Brass Body—304 Stainless Steel Spring-Loaded Piston



					1 1/4	20	400 psi @ 70° F	125 psi @ 350° F	2	35 to 350	302 Stainless Steel	303 Stainless Steel	4 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon	4753K55	000000


					Bronze Body—PTFE Spring-Loaded Ball



							1 1/4	44	400 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	Stainless Steel	PTFE	4 3/16"	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	47715K26	000000

Adapters, NPT Male Inlet × NPT Female Outlet


Male Inlet × Female Outlet	Flared Angle Adapter

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Spring Material	Seal Material	End-to-End Lg.	For Use With		Each
Bronze Body—PTFE Spring-Loaded Ball



	1 1/4	44	400 psi @ 70° F	125 psi @ 350° F	0.5	-20 to 405	Stainless Steel	PTFE	4 7/16"	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	47715K46	0000000

Connectors, BSPT Female Inlet × BSPT Female Outlet


Female Inlet × Female Outlet	Flared Angle Connector

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Spring Material	Seal Material	End-to-End Lg.	For Use With		Each
Brass Body—303 Stainless Steel Spring-Loaded Piston



	1 1/4	22	400 psi @ 70° F	125 psi @ 350° F	2	35 to 350	302 Stainless Steel	303 Stainless Steel	4 9/16"	Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon	4753K105	0000000

Threaded Check Valves for Vacuum

Prevent vacuum loss with these airtight, leakproof valves. They open to allow flow in one direction and close when flow stops or reverses.

Anodized Aluminum Body

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Vacuum Rating, in. Hg	For Use With	Ball Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet



	1 1/4	28	230 psi @ 200° F	0.07	0 to 200	3 3/8"	Any Angle, Horizontal, Vertical	0.14	Air	Acetal	Stainless Steel	Buna-N	1878N3	000000

Sump Pump Backflow-Prevention Valves with Clamps

Prevent dirty water from flowing back to your pump. Valves have flexible couplers with hose clamps to slip over PVC tubing for easy installation. At least 2 psi is required to open valves. Install for horizontal or upward flow.

Pipe Size	Max. Pressure @ Temp.	Max. Flow Rate @ 10 ft. of Head, gpm	Temp. Range, ° F	Body Material	Color	Seal Material	End-to-End Lg.		Each
1 1/4, 1 1/2	25 psi @ 70° F	4.3	35 to 130	ABS	Black	EPDM/Stainless Steel	4 13/16"	7744K11	000000

Easy-Install Threaded Check Valves for Harsh Chemicals

To reduce installation time and allow for maintenance without detaching pipe connections, these valves have union fittings. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Ball


Assembled View	Exploded View

PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.

For Drinking Water—Valves for drinking water meet NSF/ANSI 61.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	Food Industry Std.	For Use With	Ball Material	Seal Material		Each
NPT Female × NPT Female



	1 1/4	25	150 psi @ 70° F	1	40 to 140	Dark Gray	6 1/4"	Horizontal, Vertical	ASTM D1784	NSF/ANSI 61	Citric Acid, Diesel Fuel, Drinking Water, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	PVC	Fluoroelastomer	4721K16	0000000

CPVC Body—Ball


Assembled View	Exploded View

PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.

For Drinking Water—Valves for drinking water meet NSF/ANSI 61.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	Food Industry Std.	For Use With	Ball Material	Seal Material		Each
NPT Female × NPT Female



	1 1/4	25	150 psi @ 70° F	1	35 to 190	Light Gray	6 1/4"	Horizontal, Vertical	ASTM D1784	NSF/ANSI 61	Citric Acid, Diesel Fuel, Drinking Water, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	CPVC	Fluoroelastomer	4810K34	0000000

High-Temperature Threaded Check Valves

The heat-resistant rubber seal withstands temperatures up to 500° F. These valves open to allow flow in one direction and close when flow stops or reverses.

Bronze Body—Spring-Loaded Piston


1/8 to 1 1/4 Pipe Size Bronze	Repair Kit for 1/8 to 1 1/4 Pipe Size Bronze Valves

Use bronze valves when corrosion is not a concern.

Repair Kits—Repair kits include everything you need to rebuild the valve.

	Check Valves													Repair Kits
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Use With	Piston Material	Spring Material	Seal Material		Each	For Pipe Size		Each
NPT Female Inlet × NPT Female Outlet



		1 1/4	Not Rated	300 psi @ 70° F	2	50 to 500	3 3/4"	Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Xenon	Brass	316 Stainless Steel	Silicone Rubber	4872K701	0000000	1 1/4	4872K102	0000000

303 Stainless Steel Body—Poppet


	Repair Kit for 1 1/2 to 3 Pipe Size Bronze Valves and 303 Stainless Steel Valves

303 stainless steel valves are more corrosion resistant than bronze valves.

Repair Kits—Repair kits include everything you need to rebuild the valve.

	Check Valves												Repair Kits
	Pipe Size	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Use With	Spring Material	Seal Material		Each	For Pipe Size		Each
NPT Female Inlet × NPT Female Outlet



		1 1/4	17	600 psi @ 70° F	1	0 to 500	4 9/16"	Horizontal, Vertical	Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon	302 Stainless Steel	Fluoroelastomer	7295N118	0000000	1 1/4	7295N124	000000

High-Performance Threaded Check Valves for Fuel

These heavy duty valves can withstand pressures up to 1,975 psi and temperatures up to 800° F. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Steel Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. High-Performance Threaded Check Valves for Fuel.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 800



	1 1/4	8.96	1,975 psi @ 100° F	45	-20 to 800	4 3/4"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	420 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4895K66	0000000

Steel Body—Spring-Loaded Ball

Spring-loaded ball check valves resist sticking and clogging better than spring-loaded piston check valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Ball Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 800



	1 1/4	8.96	1,975 psi @ 100° F	267	-20 to 800	4 3/4"	Any Angle, Horizontal, Vertical	Removable Cap	API Std 598, API Std 602, ASME B16.34	Diesel Fuel, Natural Gas	304 Stainless Steel	304 Stainless Steel	304 Stainless Steel/Graphite	4618K74	0000000

Air Compressor Air Flow Check Valves

Prevent air from escaping an air storage tank when the air compressor is not running. These valves install on the inlet of a tank. They open to allow airflow into the tank and close when flow stops or reverses direction. They have a _1/8 NPT tapped unloader port with removable plug for connecting to a pressure switch.

NPT Female Inlet × NPT Male Outlet

Image of Product. Front orientation. Contains Annotated. Air Flow Check Valves. Air Compressor Air Flow Check Valves, NPT Female Inlet × NPT Male Outlet.

Flow Coefficient (Cv)—Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.

	Outlet Pipe Size	Flow Coefficient (Cv)	Min. Flow Rate	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, ° F	Overall Lg.	Hex Size		Each
Brass Body



	1 1/4	1 1/4	Not Rated	Not Rated	130	450	3	-15 to 400	4 7/16"	1 7/8"	2745N16	000000

Threaded Check Valves for Drinking Water

These valves meet NSF/ANSI 61 for drinking water service. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.

										White
	Pipe Size	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Piston Material	Spring Material	Seal Material		Each
NPT Female × NPT Female



		1 1/4	200 psi @ 70° F	0.5	35 to 140	6 3/16"	Drinking Water	PVC	302 Stainless Steel	EPDM	46835K35	000000

PVC Body—Swing

Swing check valves create less flow resistance than spring-loaded piston check valves.

									White
	Pipe Size	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Disc Material	Seal Material		Each
NPT Female × NPT Female



		1 1/4	125 psi @ 70° F	0.5	35 to 140	5 1/4"	Drinking Water	EPDM	EPDM	45275K45	000000

Socket-Connect Check Valves for Drinking Water

Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves meet NSF/ANSI 61, which means they’re safe to use with drinking water. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.

											White
	Pipe Size	For Pipe Schedule	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect



		1 1/4	40	200 psi @ 70° F	0.5	35 to 140	6 3/16"	Drinking Water	PVC	302 Stainless Steel	EPDM	46835K55	000000

PVC Body—Swing

Swing check valves create less flow resistance than spring-loaded piston check valves.

Clear—Clear valves let you visually inspect flow and debris accumulation.

										White		Clear
	Pipe Size	For Pipe Schedule	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	For Use With	Disc Material	Seal Material		Each		Each
Socket Connect × Socket Connect



		1 1/4	40	125 psi @ 70° F	0.5	35 to 140	5 1/4"	Drinking Water	EPDM	EPDM	45275K55	000000	6274T95	000000

Check Valves for Steam

To withstand high pressures and temperatures in steam service applications, these valves have a 316 stainless steel body, PTFE ball, and PTFE seal. They open to allow flow in one direction and close when flow stops or reverses.

316 Stainless Steel Body—Spring-Loaded Ball


	Repair Kits

Repair Kits—Repair kits include everything you need to rebuild the valve.

	Check Valves													Repair Kits
	Pipe Size	Flow Coefficient (Cv)	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Use With	Ball Material	Spring Material	Seal Material		Each	For Pipe Size		Each
NPT Female Inlet × NPT Female Outlet



		1 1/4	44	125 psi @ 350° F	0.5	-5 to 350	4 3/16"	Horizontal, Vertical	Steam	PTFE	316 Stainless Steel	PTFE	47885K76	0000000	1 1/4	47885K16	000000

Socket-Connect Check Valves for Harsh Chemicals

Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves have a plastic body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses.

PVC Body—Spring-Loaded Piston

Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Harsh Chemicals.

	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	Color	End-to-End Lg.	Mounting Position	Specs. Met	For Use With	Piston Material	Spring Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class Not Rated



	1 1/4	40, 80	26	150 psi @ 70° F	2	40 to 140	Dark Gray	6 5/8"	Horizontal, Vertical	ASTM D1784	Citric Acid, Deionized Water, Diesel Fuel, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), Water	PVC	PVC	Fluoroelastomer	1939N4	0000000

Heavy Duty Threaded Check Valves for Drinking Water

For more durability than plastic, these valves have a metal body. They meet NSF/ANSI 61 for drinking water service. All open to allow flow in one direction and close when flow stops or reverses.

Brass Body—Spring-Loaded Piston

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Food Industry Std.	For Use With	Piston Material	Spring Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet



	1 1/4	27.4	400 psi @ 170° F	0.5	10 to 210	3 3/16"	Any Angle, Horizontal, Vertical	NSF/ANSI 61	Drinking Water	PEI	302 Stainless Steel	Buna-N	8517T26	000000

Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water

Image of Product. Front orientation. Backflow-Prevention Valves. Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water, Reduced Pressure Zone.

Reduced Pressure Zone

Integral shutoff valves isolate flow for inline maintenance, and a top-entry cover provides easy access to internal components. These valves meet NSF/ANSI 61 for use with drinking water. For maximum protection from system contamination, they consist of a primary check valve and a secondary check valve. If the first check fails to close when flow stops or reverses, the secondary check valve engages to prevent backflow. A strainer prevents debris from blocking the check valves.

Reduced Pressure Zone—Reduced-pressure-zone valves have a relief valve that discharges backflow if both check valves fail.

	Temp. Range, ° F	End-to-End Lg.	Features	Specs. Met	Food Industry Std.	Certification	For Use With	Seal Material		Each
Bronze Body—Reduced Pressure Zone







	NPT Female Inlet × NPT Female Outlet

	1 1/4	175 psi @ 180° F	30	35 to 180	21 13/16"	Relief Valve, Strainer	ASSE 1013	NSF/ANSI 61	USC Foundation Approved	Drinking Water	Buna-N	45265K43	000000000

Compact Flange-Mount Check Valves

Less than half the end-to-end length of standard flange-mount check valves, these can be installed between ANSI flanges in pipelines with limited clearance. ANSI flanges are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. All have a 316 stainless steel body for excellent corrosion resistance.

316 Stainless Steel Body—Spring-Loaded Piston


Shown with Flanges (Not Included)

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	For Flange Class	For Use With	Piston Material	Spring Material	Seal Material		Each
Flanged × Flanged



	1 1/4	12.7	720 psi @ 100° F	0.5	-10 to 400	1/4"	Any Angle, Horizontal, Vertical	150, 300	Air, Argon, Helium, Krypton, Neon, Water, Xenon	316 Stainless Steel	316 Stainless Steel	Viton® Fluoroelastomer	1969N14	0000000

Socket-Connect Check Valves

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. The valve body is 316 stainless steel for excellent corrosion resistance. A removable cap provides easy access to internal components for maintenance.

316 Stainless Steel Body

Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each
Socket Connect × Socket Connect—Pressure Class 200



	1 1/4	49	200 psi @ 70° F	150 psi @ 350° F	0.5	-20 to 400	4 1/8"	Horizontal, Vertical	Removable Cap	ASTM A351	Argon, Helium, Krypton, Neon, Steam, Water, Xenon	316 Stainless Steel	PTFE	7766K56	0000000

High-Cycling Threaded Check Valves

With few moving parts to wear out, these valves withstand frequent opening and closing, pulsating flow, and rapid flow reversal. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.

Bronze Body

Image of Product. Front orientation. Check Valves. High-Cycling Threaded Check Valves.

	Flow Coefficient (Cv)	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Min. Opening Pressure, psi	Temp. Range, ° F	End-to-End Lg.	Mounting Position	Features	Specs. Met	For Use With	Disc Material	Seal Material		Each
NPT Female Inlet × NPT Female Outlet—Pressure Class 125



	1 1/4	15.67	200 psi @ 70° F	175 psi @ 353° F	2	-20 to 405	3 5/8"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K14	0000000


	NPT Female Inlet × NPT Female Outlet—Pressure Class 300



			1 1/4	15.67	1,000 psi @ 70° F	520 psi @ 421° F	2	-20 to 450	4 1/16"	Horizontal	Removable Cap	MSS SP-80	Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon	Bronze	Bronze	4894K84	000000

High-Temperature Threaded Check Valves for Oil and Fuel

For more than twice the temperature rating of standard check valves for oil and fuel, these have a heat-resistant fluoroelastomer seal that can withstand temperatures up to 500° F. They open to allow flow in one direction and close when flow stops or reverses.

	Temp. Range, ° F	End-to-End Lg.	For Use With	Piston Material	Spring Material	Seal Material		Each
Bronze Body







	NPT Female × NPT Female

	1 1/4	300 psi @ 70° F	2	50 to 500	3 3/4"	Butane, Diesel Fuel, Fuel Oil, Natural Gas, Propane	Brass	316 Stainless Steel	Fluoroelastomer	4872K17	0000000

Vacuum Breakers

Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.

90° Elbow

Elbows are designed for intermittent flow. They discharge liquid directly and should not be installed in areas where spillage could cause damage.

								Brass Body
	Inlet Pipe Size	Outlet Pipe SIze	Max. Pressure @ Temp.	Temp. Range, ° F	Port-to-Port Lg.	Seal Material	For Use With		Each
NPT Female Inlet × NPT Female Outlet



		1 1/4	1 1/4	125 psi @ 70° F	35 to 180	2"	Silicone Rubber	Water	47685K44	0000000