NPSH Connectors | McMaster-Carr

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23 Products

About Fire-Fighting Hose Threads

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Metal Barbed Hose Fittings for Air and Water

Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.

Brass fittings are softer than other metal fittings, so they’re easier to thread together. Plain brass fittings have good corrosion resistance. Fittings that swivel until tightened rotate 360° for easy installation. Fittings with a threaded end are also known as hose nipples.

NPSH (National Pipe Straight Hose) female threads are compatible with male NPT, NPTF, and NPSM threads.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, Barbed Hose × NPSH Male Threaded Hose

Maximum Pressure: 150 psi @ 72° F
Temperature Range: -40° to 160° F
Attachment Type: Use Band-and-Buckle Clamps
Specifications Met: SAE J476

Brass
For Hose ID	Pipe Size	Pkg. Qty.		Pkg.
1"	1	1	0000000	00000

Straight Adapters (Swivels Until Tightened), Barbed Hose × NPSH Female Threaded Hose

Maximum Pressure: 150 psi @ 72° F
Temperature Range: -40° to 160° F
Attachment Type: Use Band-and-Buckle Clamps
Specifications Met: SAE J476

Brass
For Hose ID	Pipe Size	Gasket Material	Pkg. Qty.		Pkg.
1"	1	SBR Rubber	1	0000000	00000

Metal Garden Hose Fittings for Drinking Water

These fittings meet NSF/ANSI Standard 61 for drinking water. Connect them to rubber or plastic garden hose for a variety of water supply applications. Fittings are brass for good corrosion resistance.

Fittings that swivel until tightened rotate 360° for easy installation.

Fittings with a barbed end are also known as hose menders and splicers. Use them to connect lengths of hose or to repair damaged hose. To connect, slide the barbed end into rubber or plastic hose and secure with a clamp.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, Barbed Hose × NPSH Male Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Attachment Type: Use Worm-Drive Clamps
Specifications Met: NSF/ANSI 61

Brass
For Hose ID	Pipe Size		Each
1"	1	0000000	000000

Straight Adapters (Swivels Until Tightened), Barbed Hose × NPSH Female Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Attachment Type: Use Worm-Drive Clamps
Specifications Met: NSF/ANSI 61

Brass
For Hose ID	Pipe Size	Washer Material		Each
1"	1	EPDM Rubber	0000000	000000

Fire-Fighting Hose Fittings

Connect these fittings to fire hydrants and washdown equipment. Made of brass, they have good corrosion resistance. Some have a hex in the middle so you can tighten them with a wrench.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads. Male NPSH (National Pipe Straight Hose) threads are compatible with female NPSH threads. Female NPSH threads are compatible with male NPSH, NPT, NPTF, and NPSM threads.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, NH/NST Male Threaded Hose × NPSH Male Threaded Hose

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	0000000	000000

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	0000000	000000

Straight Adapters, NPSH Male Threaded Hose × NH/NST Female Threaded Hose

Pipe Size	Fire Hose Trade Size	Material		Each
1 1/2	1 1/2	Brass	0000000	000000

Straight Adapters, NPSH Male Threaded Hose × NPT Male Threaded Pipe

Pipe Size	Material		Each
1	Brass	00000000	000000
1 1/2	Brass	0000000	00000

Straight Adapters, NPT Male Threaded Pipe × NPSH Female Threaded Hose

Pipe Size	Material		Each
1 1/2	Brass	0000000	000000

Straight Reducing Adapters, NPT Male Threaded Pipe × NPSH Female Threaded Hose

Pipe Size
(A)	(B)	Material		Each
1 1/2	3/4	Brass	0000000	000000

Pin-Lug Fire-Fighting Hose Fittings

The pin lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately). All are brass for good corrosion resistance.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Pipe

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	0000000	000000

Straight Adapters, NPSH Male Threaded Pipe × NH/NST Female Threaded Hose

Pipe Size	Fire Hose Trade Size	Material		Each
1 1/2	1 1/2	Brass	0000000	000000

Rocker-Lug Fire-Fighting Hose Fittings

The rocker lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately).

Fittings that swivel until tightened rotate to help prevent kinking during installation.

Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance. Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Brass
Fire Hose Trade Size	Pipe Size		Each
1 1/2	1 1/2	0000000	000000

Straight Adapters, NPT Male Threaded Hose × NPSH Male Threaded Hose

Aluminum
Pipe Size		Each
1 1/2	0000000	000000

Straight Adapters, NPT Male Threaded Hose × NPSH Female Threaded Hose

Aluminum
Pipe Size		Each
2	0000000	000000

Straight Adapters (Swivels Until Tightened), NPT Female Threaded Hose × NPSH Female Threaded Hose

Aluminum
Pipe Size		Each
1 1/2	0000000	000000

Straight Connectors (Swivels Until Tightened), NPSH Female Threaded Hose

Aluminum
Pipe Size		Each
1 1/2	0000000	0000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Brass
Fire Hose Trade Size (A)	Pipe Size (B)		Each
1 1/2	2 1/2	0000000	000000

Straight Reducing Adapters, NPSH Male Threaded Hose × NH/NST Female Threaded Hose

Brass
Pipe Size (A)	Fire Hose Trade Size (B)		Each
1 1/2	2 1/2	0000000	000000

Straight Reducing Adapters, NPSH Male Threaded Hose × NPSH Female Threaded Hose

Pipe Size
(A)	(B)		Each
Brass
1 1/2	2 1/2	0000000	000000
Aluminum
1 1/2	2	0000000	00000

Diverting Valves with Fire-Fighting Hose Fittings

Valve Type: Ball
For Use With: Water
Seal Material: Buna-N Rubber

Control the flow of water in two directions from a single source—these diverting valves have two balls and handles for independent operation of each outlet. They can direct flow to one side outlet at full capacity while shutting off flow to the second side outlet, direct flow to both side outlets at reduced capacity, or shut off flow to both side outlets. Valves have a brass body for good corrosion resistance. They are for use with fire-fighting hose.

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.

Male NPSH (National Pipe Straight Hose) threads are compatible with female NPSH threads. Female NPSH threads are compatible with male NPSH, NPT, NPTF, and NPSM threads.

For technical drawings and 3-D models, click on a part number.

NPSH Female × NPSH Male × NPSH Male

Brass Body
Inlet Pipe Size	Outlet Pipe Sizes	Flow Pattern	Flow Coefficient (Cv)	Max. Pressure	Temp. Range, °F	End-to-End Lg.		Each
2 1/2	1 1/2 × 1 1/2	Y-Pattern	Not Rated	300 psi @ 150° F	-20° to 150°	5 5/8"	000000	0000000