Fire Hose Reducers | McMaster-Carr

	Type Type

	Reducing Adapter
	Reducer
	Valve

	Fire Hose Trade Size Fire Hose Trade Size

3/4

1 1/2

2 1/2

	Thread Type Thread Type

NH/NST

NPT

NPSH

	Pipe Size Pipe Size

3/4

1 1/2

2 1/2

	Gender Gender


Male	Female

	Connection Type Connection Type


Hose	Pipe

	Shape Shape


Straight	Wye

	Lug Style Lug Style


Rocker	Pin

	Length Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Mounting Orientation Mounting Orientation

Horizontal

Vertical

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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28 Products

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.

About Fire-Fighting Hose Threads

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. 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 Reducers, NH/NST Male Threaded Hose

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

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPT Male Threaded Pipe

Fire Hose Trade Size (A)	Pipe Size (B)	Material		Each
1 1/2	1	Brass	0000000	000000
1 1/2	2	Brass	0000000	00000
1 1/2	2 1/2	Brass	0000000	00000
2 1/2	1 1/2	Brass	0000000	000000
2 1/2	2	Brass	0000000	00000
2 1/2	3	Brass	0000000	00000

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

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

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

Fire Hose Trade Size (A)	Pipe Size (B)	Material		Each
1 1/2	1	Brass	0000000	000000
2 1/2	1 1/2	Brass	0000000	00000
2 1/2	2	Brass	0000000	00000

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

PIpe Size (A)	Fire Hose Trade Size (B)	Material		Each
1 1/2	3/4	Brass	0000000	000000
1 1/2	2 1/2	Brass	0000000	00000

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

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 are brass for good corrosion resistance.

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

Fire Hose Trade Size
(A)	(B)	Material		Each
1	1 1/2	Brass	0000000	000000
1	2 1/2	Brass	0000000	00000
1 1/2	2 1/2	Brass	0000000	00000
2 1/2	1 1/2	Brass	0000000	00000

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

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

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

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

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

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

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

PIpe Size (A)	Fire Hose Trade Size (B)	Material		Each
1	1 1/2	Brass	0000000	000000
1	2 1/2	Brass	0000000	00000
2	2 1/2	Brass	0000000	00000

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). Fittings swivel until tightened, which makes installation easier. They 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 Reducing Adapters, NH/NST Female Threaded Hose × NPT Female Threaded Pipe

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

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

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

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.

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

NH/NST Female × NH/NST Male × NH/NST Male

Brass Body
Inlet Fire Hose Trade Size	Outlet Fire Hose Trade 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

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