Water Piston Pumps | McMaster-Carr

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How to Prime Your Pump

How to Determine Feet of Head

About Process Pumps

About Drum Pumps

With a higher pressure than other air-powered drum pumps, these pumps move thick chemicals with a viscosity of up to 5,000 centipoise. A stainless steel housing stands up to acids, solvents, and other caustics. Install an air line filter/lubricator to ensure efficiency and reduce wear on the pump.

			Temp. Range, °F						Air Connection			Intake		Discharge
Flow Rate, gpm	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	Air Pressure, psi	Air Consumption, cfm	For Drum Opening Size	Includes	Pipe Size	Gender	Thread Type	Tube OD	Tube Lg.	Pipe Size	Gender	Thread Type		Each
4	5	5,000	35°	120°	180	1.5	2 NPT	__	1/4	Female	NPT	2 1/8"	10"	3/4	Female	NPT	000000	000000000
4	55	5,000	35°	120°	180	1.5	2 NPT	Drum Connector	1/4	Female	NPT	2 1/8"	36"	3/4	Female	NPT	000000	00000000

Air-Powered Drum Pumps with Sanitary
Quick-Clamp Fittings for Food and Beverage

Made for use with food, water, and beverage, these pumps have a sanitary quick-clamp discharge connection for easy cleaning. Wetted parts are FDA compliant. Install an air line filter/lubricator to ensure efficiency and reduce wear on the pump.

			Temp. Range, °F						Air Connection			Intake		Discharge
Flow Rate, gpm	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	Air Pressure, psi	Air Consumption, cfm	For Drum Opening Size	Includes	Pipe Size	Gender	Thread Type	Tube OD	Tube Lg.	Tube Connection Type	For Tube OD	Specifications Met		Each
2.5	55	25,000	35°	180°	100	6	2 NPT	Drum Connector	3/8	Female	NPT	2"	37 1/2"	Quick Clamp	1"	FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 177.1550; FDA Compliant 21 CFR 177.2600	000000	000000000

Selectable-Flow-Rate Easy-Stroke Drum Pumps for Water and Chemicals

With Plastic Intake Tube and Housing

With Stainless Steel Intake Tube and Housing

These pumps have a selectable flow rate, so you can adjust flow for different dispensing applications. A lever handle maximizes output with each stroke for low-effort dispensing.

Whenever working with flammable liquids, always bond and ground your application for static control. For more information about bonding and grounding, see Sections 1910.106 and 1910.107 of the Federal OSHA Code or see bonding and grounding equipment.

			Temp. Range, °F				Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	For Discharge Tube ID	Spout Type		Each
Plastic Intake Tube and Housing
8, 10, 12	15-55	500	Not Rated	180°	1 1/2 NPT, 2 NPT	Drum Connector	1 5/8"	24 1/2"-34 1/2"	1"	Removable	0000000	000000
Stainless Steel Intake Tube and Housing
6, 8, 10, 12	15-55	2,000	Not Rated	140°	1 1/2 NPT, 2 NPT	Drum Connector	1 1/8"	18 1/2"-32 1/2"	11/16"	Removable	0000000	000000

Easy-Stroke Drum Pumps for Water, Coolant, and Chemicals

A lever handle maximizes output with each stroke for low-effort dispensing.

Style A pumps are rated for liquids up to 2,200 centipoise. They do not come with a drum connector. To attach them to a container, select an optional connector.

Style B pumps are for thin liquids with a viscosity up to 250 centipoise. They have a built-in drum connector.

				Temp. Range, °F				Intake
Style	Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Drum Pump Type		Each
A	10	15-55	2,200	Not Rated	125°	__	__	1"	19"-38 1/4"	Lever Handle	0000000	0000000
B	11	15-55	250	-15°	150°	2 NPT	Drum Connector	1"	19 3/4"-35 1/2"	Lever Handle	0000000	000000

Optional M64 Buttress × 2 NPT Drum Connector for Style A

0000000

Each

000000

Drum Pumps for Water and Chemicals

Push the plunger to pump water, cleaners, and chemicals.

Styles A, B, and G are for thin liquids with a maximum viscosity of 700 or 750 centipoise.

Styles C-F are rated for liquids up to 2,500 centipoise. Style C are often used as hand pumps and do not come with a connector. To attach them to a container, select an optional connector.

Style A

			Temp. Range, °F				Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Discharge Location		Each
8	5-15	700	Not Rated	120°	2 NPT	Drum Connector	1 1/2"	22"	Spout End	0000000	000000
22	15-55	700	Not Rated	120°	2 NPT	Drum Connector	1 1/2"	39"	Spout End	0000000	00000

Style B

			Temp. Range, °F				Intake		Discharge
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
8	5-15	700	Not Rated	120°	2 NPT	Drum Connector	1 1/2"	22"	7/16"	5/8"	22"	0000000	000000
22	15-55	700	Not Rated	120°	2 NPT	Drum Connector	1 1/2"	39"	7/16"	5/8"	36"	0000000	00000

Style C

			Temp. Range, °F		Intake		Discharge
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
5	5-15	2,500	35°	120°	1/2"	18"	7/16"	9/16"	9"	0000000	000000

Optional 2 NPT Connector	Each	000000
Optional 70 mm Drum Opening Connector	Each	00000
Optional 3/4 NPT Connector	Each	00000
Optional 33 mm Drum Opening Connector	Each	00000

Style D

			Temp. Range, °F				Intake		Discharge
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size, mm	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
6	5	2,500	35°	120°	61	Drum Connector	1/2"	14 1/2"	7/16"	9/16"	36"	0000000	000000
6	5	2,500	35°	120°	63	Drum Connector	1/2"	14 1/2"	7/16"	9/16"	36"	0000000	00000
6	5	2,500	35°	120°	70	Drum Connector	1/2"	14 1/2"	7/16"	9/16"	36"	0000000	00000

Style E

			Temp. Range, °F				Intake		Discharge
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
5	5-55	2,500	35°	120°	2 NPT	Drum Connector	9/16"	36"	7/16"	9/16"	9"	0000000	000000
8	5-30	2,500	35°	120°	2 NPT	Drum Connector	1/2"	18"	7/16"	9/16"	48"	0000000	00000

Style F

Pumps
			Temp. Range, °F				Intake		Discharge					Optional 2 5/8" Buttress Connectors		Replacement 2 NPT Connectors
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each		Each		Each
Buna-N Rubber Piston
28	55	2,500	35°	120°	2 NPT	Drum Connector	1 1/2"	38"	1 1/4"	1 1/2"	36"	0000000	0000000	000000	00	000000	00
28	55	2,500	35°	120°	2 NPT	Drum Connector	1 1/2"	38"	1 1/4"	1 1/2"	72"	0000000	000000	000000	00	000000	00
Viton® Fluoroelastomer Rubber Piston
28	55	2,500	35°	120°	2 NPT	Drum Connector	1 1/2"	38"	1 1/4"	1 1/2"	36"	0000000	000000	0000000	000000	0000000	000000
28	55	2,500	35°	120°	2 NPT	Drum Connector	1 1/2"	38"	1 1/4"	1 1/2"	72"	0000000	000000	0000000	00000	0000000	00000

Compact Drum Pumps for Water and Chemicals

Designed to move low volumes of caustic liquids in confined areas, these pumps have a thin intake tube and a small handle. They are often used to pump cleaning fluids, acid-washing solutions, and bleach.

Style A pumps have a selectable flow rate, so you can adjust flow for different dispensing applications.

Style B pumps have a flexible discharge spout.

				Temp. Range, °F				Intake
Style	Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Spout Type		Each
A	2, 4, 6, 8	5	Not Rated	Not Rated	125°	3/4 NPT	__	5/8"	18 1/4"	Fixed	0000000	000000
A	2, 4, 6, 8	15-55	Not Rated	Not Rated	125°	2 NPT, 3/4 NPT	Two Drum Connectors	5/8"	33"	Fixed	0000000	00000
A	4, 8, 12, 16	15-55	Not Rated	Not Rated	125°	2 NPT, 3/4 NPT	Two Drum Connectors	5/8"	33"	Fixed	0000000	00000
B	3	55	Not Rated	40°	150°	2 NPT	Drum Connector	1 3/4"	32"	Flexible	0000000	000000

Drum Pumps for Water and Coolant

A 316 stainless steel housing makes these pumps resistant to coolants such as ethylene glycol.

Repair kits include a gasket, a packing gland, a piston, a piston washer, and a push-on nut.

			Temp. Range, °F				Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.		Each
8	5-15	300	Not Rated	140°	2 NPT	Drum Connector	1/2"	22 1/2"	0000000	0000000
16	15-55	300	Not Rated	140°	2 NPT	Drum Connector	1 1/8"	39 1/2"	0000000	000000

Repair Kit	Each	000000
Replacement Drum Connector	Each	00000
Optional 5-Gallon Pail Adapter (2 NPT × 1 3/4 NPT) for Pump with 1/2" Intake Tube OD	Each	00000

Nondrip Drum Pumps for Water and Chemicals

Remote Tap Kit

Eliminate leaks and waste with a faucet-style nondrip nozzle that quickly starts and stops flow. Pressurize your container with a few pumps of the plunger handle, and use the one-touch nozzle to manage flow. Hold down the nozzle for intermittent dispensing, open the nozzle fully for continuous flow, and close the nozzle to stop flow entirely.

Remote tap kits extend your pump's reach for transferring liquid to tanks, mixers, and sprayers.

Pumps
			Temp. Range, °F				Intake				Remote Tap Kits
Flow Rate, gpm	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.		Each		Each
4.5	2-55	270	35°	110°	2 NPT	Drum Connector	5/8"	40"	0000000	0000000	0000000	0000000

Drum Pumps for Harsh Chemicals

With Spout End

With Nozzle

Made with PTFE components, these pumps stand up to aggressive chemicals our other drum pumps can't, such as hydrochloric acid, bleach, sodium hydroxide, and methyl ethyl ketone (MEK). A stopcock prevents fluid and vapor from leaking after use.

			Temp. Range, °F				Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.		Each
With Spout End
9	16	500	35°	105°	2"	Drum Connector	1 1/4"	23 5/8"	000000	000000000
With Nozzle
9	16	500	35°	105°	2"	Drum Connector	1 1/4"	23 5/8"	000000	00000000

Drum Pumps for Oil

Use these pumps to move lubricating oil, such as motor oil. Spout is removable and can be replaced with a garden hose.

			Temp. Range, °F				Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Spout Type	Drum Pump Type		Each
16	15-55	316	50°	110°	2 NPT	Drum Connector	1 1/2"	37"	Removable	Plunger	0000000	000000

Drum Pumps for Food and Beverage

Use these pumps in food and beverage applications.

Style B-E pumps are FDA compliant for direct contact with food. Style B and C pumps have a colorful strap for color-coding your drums, which makes it easy to identify the drum contents.

				Temp. Range, °F				Intake			Discharge
Style	Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Discharge Location	Tube ID	Tube Lg.	Specifications Met	Choose a Strap Color		Each
B	12	5	8,800	35°	140°	2 NPT	5 Gallon Pail Adapter, Drum Connector	1 5/8"	16 1/2"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	White	0000000	000000
B	15	5	8,800	40°	120°	2 NPT	5 Gallon Pail Adapter, Drum Connector	1 1/2"	16 1/2"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	Black, Blue	00000000	00000
B	15	15, 30	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	30"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	Green	0000000	00000
B	15	30	8,800	40°	120°	2 NPT	Drum Connector	1 11/16"	30"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	White	0000000	00000
B	15	55	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	36"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	Black, Blue, Green, Orange, Purple	00000000	00000
B	15	55	8,800	40°	120°	2 NPT	Drum Connector	1 11/16"	45"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	White	0000000	00000
C	12	5	8,800	35°	140°	2 NPT	5 Gallon Pail Adapter, Drum Connector	1 5/8"	16 1/2"	Tube End	3/4"	33"	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	White	0000000	00000
C	15	55	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	36"	Tube End	3/4"	32 1/2"	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	Black, Blue, Yellow	00000000	00000
D	15	275	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	46 1/2"	Spout End	__	__	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	__	0000000	000000
E	15	15, 30	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	30"	Tube End	3/4"	32 1/2"	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	__	0000000	00000
E	15	55	8,800	40°	120°	2 NPT	Drum Connector	1 1/2"	36"	Tube End	3/4"	32 1/2"	FDA Compliant 21 CFR 174.5; FDA Compliant 21 CFR 177.1520; FDA Compliant 21 CFR 178.2010; FDA Compliant 21 CFR 178.3297; FDA Compliant 21 CFR 178.3400	__	0000000	00000

Siphon Drum Pumps

Since these pumps use suction to draw liquid out of your container, they continue dispensing once you get them started. They're often used with coolant and water.

Adjust pumps with a 5-7 gpm flow rate for different dispensing applications.

Pumps

				Temp. Range, °F				Intake		Discharge
	Flow Rate, gpm	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
A	5	15-55	88	Not Rated	140°	2 NPT	Drum Connector	7/8"	34"	13/16"	1"	48"	0000000	000000
A	7	15-55	88	Not Rated	140°	2 NPT	Drum Connector	1"	34"	13/16"	1"	48"	0000000	00000
B	5-7	5	650	Not Rated	140°	2 NPS, 70 mm	Drum Connector	1 1/2"	16"	1"	1 1/4"	60"	0000000	00000
B	5-7	5-6	650	Not Rated	140°	2 NPS	Drum Connector	1 1/2"	16"	1"	1 1/4"	60"	0000000	00000
B	5-7	15	650	Not Rated	140°	2 NPS	Drum Connector	1 1/2"	24"	1"	1 1/4"	60"	0000000	00000

Optional Connectors for Style B

Connector

For Drum Opening Size	Thread Size	Thread Type		Each
2 NPS	M56	Buttress	0000000	000000
2 NPS	M63	Buttress	0000000	00000
2 NPS	M66	Buttress	0000000	00000
2 NPS	M70	Buttress	0000000	00000

Precise-Flow Electric Drum Pumps for Water, Oil, and Chemicals

For accurate dispensing in extremely low-flow applications, adjust flow in 2% increments. These pumps are compatible with chemicals such as ammonia and etching and cleaning solutions.

				Temp. Range, °F						Intake		Discharge			Pumps
Flow Rate, gpm	Discharge Pressure, psi	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	Horsepower	Current, A	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
120V AC, Single Phase
Plug
0.001-0.01	100	30	1,500	35°	125°	1/30 hp	1.7	2"	Tube Nut Connector	3/8"	20ft.	1/4"	1/4"	20ft.	0000000	0000000
0.001-0.1	100	30	1,500	35°	100°	1/16 hp	0.6	2"	Drum Connector	3/8"	20ft.	1/4"	1/4"	20ft.	0000000	00000000

Air-Powered Constant-Flow-Rate Pumps

Commonly called piston pumps, these are often used in high-pressure applications, such as hydrostatic testing of pipelines, tanks, and valves. Flow and outlet liquid pressure can be controlled by varying the air pressure. To calculate discharge liquid pressure, multiply the air pressure by the ratio shown in the table. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber.

Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.

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

Flow Rate, gpm					Air Pressure, psi						Overall
@ 0 psi	@ 3,000 psi	Max. ft. of Head	Max. Discharge Pressure, psi	Max. Viscosity, cP	Min.	Max.	Air Consumption, scfm	Air Connection (NPT)	Intake Pipe Connection (NPT)	Discharge Pipe Connection (NPT)	Lg.	Wd.	Ht.		Each
86:1 Discharge Liquid to Inlet Air Pressure Ratio
0.19	0.17	28,764	12,470	100	15	145	20	1/4 Female	3/8 Female	1/4 Female	4 5/8"	4"	9"	0000000	000000000
28:1 Discharge Liquid to Inlet Air Pressure Ratio
0.58	0.13	9,365	4,060	100	15	145	20	1/4 Female	3/8 Female	1/4 Female	4 5/8"	4"	9"	0000000	00000000

High-Pressure Constant-Flow-Rate Pumps without Motor for Pressure Washing

Also known as plunger pumps, these can provide pressures up to 3,000 psi. Use them for washdowns, drain jetting, and other pressurized water-spraying applications. Connect them directly to an electric motor to alter the pump speed. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.

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

					Intake			Discharge			Overall
Max. Flow Rate, gpm	Max. Pressure, psi	Temp. Range, °F	Required hp	For NEMA Frame	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.	For Shaft Dia.		Each
2	2,000	-20° to 160°	2.7	56C	3/8	NPT	Female	3/8	NPT	Female	8 1/4"	8 5/8"	6 1/2"	5/8"	00000000	0000000
3	3,000	-20° to 140°	6 1/5	182TC, 184TC	1/2	NPT	Female	3/8	NPT	Female	9 1/2"	9 1/4"	7 1/8"	1 1/8"	00000000	000000
4	2,000	-20° to 140°	5 1/2	182TC, 184TC	1/2	NPT	Female	3/8	NPT	Female	9 1/2"	9 1/4"	7 1/8"	1 1/8"	00000000	000000