Ft. Of H2O Gauges | McMaster-Carr

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	Connection Location Connection Location

	Bottom		Center Back

	Pipe Size Pipe Size

1/4

1/2

	Thread Type Thread Type

NPT

	For Use With For Use With

	Scale Scale	Show

ft. of H2O

	Scale Scale	Hide

	Measures Measures

Pressure

Temperature

	Display Type Display Type

	Dial

	Dial Type Dial Type

	Dry

	Scale Type Scale Type

	Dual

	Dial Diameter Dial Diameter

	Stem Length Stem Length

1 1/2"

	Maximum Process Temperature Maximum Process Temperature

150° F

320° F

	Connection Material Connection Material

Brass

	Connection Type Connection Type

	Pipe

	Case Material Case Material

Steel

Aluminum

	Case Finish Case Finish

Painted

	Maximum Environment Temperature Maximum Environment Temperature

140° F

150° F

	Maximum Pressure, psi Maximum Pressure, psi

	Connection Style Connection Style

Threaded

	Gender Gender

Male

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

DFARS Specialty Metals
COTS-Exempt

	Mounting Orientation Mounting Orientation

Any Angle

Upright

	Minimum Process Temperature Minimum Process Temperature

-40° F

70° F

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8 Products

About Pressure Gauges

About Pipe Size

Bottom Connection (Flange Mount)

Keep tabs on liquid levels in pump and tank applications with these gauges—a dual scale displays pressure in feet of H₂O and psi. They are suitable for critical processes that require high accuracy, such as hydraulic and laboratory applications. Mount them with the face dial upright.

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

Aluminum Case with Brass Connection—Dual Scale (psi, ft. of H₂O)

For Use With: Air, Water, and Hydraulic Fluid
Accuracy: ±1% Full Scale (Grade 1A)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	ft. of H₂O	psi	ft. of H₂O	psi	ft. of H₂O
4 1/2" Dial Diameter
0 to 15	0 to 35	0.25	0.5	1	5
0 to 30	0 to 70	0.5	1	5	10
0 to 60	0 to 140	1	2.5	5	10
0 to 100	0 to 230	1	5	10	50
0 to 160	0 to 370	2.5	5	20	50
0 to 200	0 to 460	2	5	20	50
0 to 300	0 to 690	5	10	50	100
6" Dial Diameter
0 to 15	0 to 35	0.25	0.5	1	5
0 to 30	0 to 70	0.5	1	5	10
0 to 60	0 to 140	1	2.5	5	10
0 to 100	0 to 230	1	5	10	50
0 to 160	0 to 370	2.5	5	20	50
0 to 200	0 to 460	2	5	20	50
0 to 300	0 to 690	5	10	50	100
8 1/2" Dial Diameter
0 to 15	0 to 35	0.25	0.5	1	5
0 to 30	0 to 70	0.5	1	5	10
0 to 60	0 to 140	1	2	10	20
0 to 100	0 to 230	1	5	10	50
0 to 160	0 to 370	2	5	20	50
0 to 200	0 to 460	2	10	20	100
0 to 300	0 to 690	5	10	50	100

				Mounting		Bolt			Flange		Bottom Connection (Flange Mount)
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Orientation	Fasteners Included	Circle Dia.	Hole Dia.	No. of Holes	Location	OD		Each
NPT Male
4 1/2"	1/4	-40° to 150°	-40° to 150°	Upright	No	5 3/8"	13/64"	3	Back	5 7/8"	0000000	0000000
6"	1/4	-40° to 150°	-40° to 150°	Upright	No	6 3/4"	13/64"	3	Back	7 1/2"	0000000	000000
8 1/2"	1/4	-40° to 150°	-40° to 150°	Upright	No	9 5/8"	13/64"	3	Back	10 1/4"	0000000	000000

Steam Pressure Gauges

Bottom Connection

Center Back Connection

Designed for use with boilers, these gauges have a dual scale that displays pressure in psi and feet of H₂O and displays temperature in °F/°C.

Painted Steel Case with Brass Connection—Dual Scale (psi/ft. of H₂O, Fahrenheit/Celsius)

For Use With: Steam and Water
Accuracy: ±2.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	ft. of H₂O	psi	ft. of H₂O	psi	ft. of H₂O
2 1/2" Dial Dia.
0 to 75	0 to 170	5	10	20	50
3 1/4" Dial Dia.
0 to 100	0 to 230	2	10	20	50
0 to 200	0 to 460	5	20	40	100

		Display Temp. Range
Dial Diameter	Pipe Size	°F	°C	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Mounting Orientation	Stem Lg.	Shoulder Lg.		Each
Bottom Connection
NPT Male
3 1/4"	1/2	70° to 320°	20° to 160°	-40° to 140°	70° to 320°	Black	Any	2"	__	0000000	000000
Center Back Connection
NPT Male
2 1/2"	1/4	70° to 320°	20° to 160°	-40° to 140°	70° to 320°	Black	Any	1"	__	0000000	00000
2 1/2"	1/4	70° to 320°	20° to 160°	-40° to 140°	70° to 320°	Black	Any	1"	2"	0000000	00000
2 1/2"	1/4	70° to 320°	20° to 160°	-40° to 140°	70° to 320°	Black	Any	1 1/2"	2"	0000000	00000
3 1/4"	1/2	70° to 320°	20° to 160°	-40° to 140°	70° to 320°	Black	Any	2"	__	0000000	00000

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About Pressure Gauges

About Pipe Size

High-Accuracy Pressure Gauges for Pumps

Steam Pressure Gauges