Oil Piston Pumps | McMaster-Carr

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Less than 10 fl oz/stroke

10 fl oz/stroke to 14.9 fl oz/stroke

15 fl oz/stroke to 19.9 fl oz/stroke

20 fl oz/stroke to 24.9 fl oz/stroke

25 fl oz/stroke or greater

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Maximum Flow Rate

For Drum Opening Pipe Size

Maximum Feet of Head

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78 Products

About Process Pumps

About Drum Pumps

How to Prime Your Pump

How to Determine Feet of Head

Transfer lubricating oil such as hydraulic and motor oil with these pumps. They handle nearly twice the amount of pressure as other air-powered drum pumps to move high-viscosity liquids. 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 Range, psi	Air Consumption, cfm	For Drum Opening Size	Includes	Pipe Size	Gender	Thread Type	Tube OD	Tube Lg.	Pipe Size	Gender	Thread Type		Each
6	15	8,750	10°	150°	0-150	14	2 NPT	Drum Connector	1/4	Female	NPTF	1 3/4"	22"	1/2	Female	NPT	0000000	0000000
10	55	1,500	Not Rated	140°	30-150	9	2 NPT	Drum Connector	1/4	Female	NPT	2"	37"	1/2	Female	NPT	0000000	000000

Replacement Connector

00000000

Each

000000

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 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
B	11	15-55	250	-15°	150°	2 NPT	Drum Connector	1"	19 3/4"-35 1/2"	Lever Handle	0000000	0000000

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

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

Deep-Reach Suction Pumps for Fuel

Remove liquid from hard-to-reach areas with a long, flexible intake tube that extends into deep and hard-to-access tanks.

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.

Pumps with a PVC housing have a handle that acts as a siphon when fully extended.

		Temp. Range, °F		Intake		Discharge
Flow Rate, oz./stroke	Max. Viscosity, cP	Min.	Max.	Tube OD	Tube Lg.	Tube ID	Tube OD	Tube Lg.		Each
PVC Plastic Housing
4	2,500	35°	120°	9/16"	72"	7/16"	9/16"	36"	0000000	000000

Drum Pumps for Fuel and Flammable Liquid

All of these pumps have bonding and grounding wires, while some also have an internal flame arrester, to pump fuel, cleaning solvents, and lacquer thinners.

Steel pumps work with fuels and flammable liquids, but not especially aggressive and corrosive chemicals.

Stainless steel pumps handle aggressive and corrosive liquids that steel pumps cannot.

Pumps for 5-gallon containers have a drum connector that fits Rieke flex spouts and two screw cap adapters: 1 3/4" and 2 1/8".

Repair kits include components such as extension tubes, gaskets, and pistons.

						Intake
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Max. Temp.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Features		Each
Steel
4	5	110	Not Rated	1 3/4", 2 1/4", 2 1/8", 2 7/8"	Drum Connector, Flex Spout Adapter, Two Screw Cap Adapters (1 3/4" & 2 1/8")	1/2"	16"	Bonding and Grounding Wires, Internal Flame Arrester	0000000	0000000
4	5	650	Not Rated	1 3/4", 2 1/4", 2 1/8", 2 7/8"	Drum Connector, Flex Spout Adapter, Two Screw Cap Adapters (1 3/4" & 2 1/8")	1 1/8"	15"	Bonding and Grounding Wires, Internal Flame Arrester	0000000	000000
8	15-55	650	Not Rated	2 NPT	Drum Connector	9/16"	16"-38"	Bonding and Grounding Wires, Internal Flame Arrester	0000000	000000
8	55	110	Not Rated	2 NPT	Drum Connector	1/2"	22"	Bonding and Grounding Wires, Internal Flame Arrester	0000000	000000
316 Stainless Steel
10	5-7	650	140° F	2 5/8", 2"	Drum Connector	1 1/2"	18"	Bonding and Grounding Wires	0000000	000000
20	30-55	650	140° F	2"	Drum Connector	1 1/2"	37 1/2"	Bonding and Grounding Wires	0000000	000000

Repair Kit for Steel Pumps with 110 cP Max. Viscosity	0000000	Each	0000000
Repair Kit for Steel Pumps with 650 cP Max. Viscosity	0000000	Each	000000

Quick-Dispensing Drum Pumps for Fuel

A lever handle delivers fluid on both the forward and backward strokes for faster dispensing than other drum pumps. The handle can be mounted with the knob above or below the pump body. Lock the handle with a padlock (not included).

Repair kits include a gasket, a piston ring, O-rings, and valves.

			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	For Discharge Hose ID	Spout Type	Max. Shackle Dia.		Each
32	55	410	Not Rated	70°	2 NPT	Drum Connector	1 5/16"	34"	Spout End, Pump Body	3/4"	Removable	1/4"	0000000	0000000

Replacement Drum Connector	0000000	Each	000000
Repair Kit	0000000	Each	00000

Quick-Dispensing Drum Pumps with Nozzle for Fuel

These pumps have a 3/4" ID discharge hose for transfer applications and a vacuum breaker that drains the hose to prevent siphoning. A lever handle delivers fluid on both the forward and backward strokes for faster dispensing than other drum pumps. The handle can be mounted with the knob above or below the pump body. Lock the handle with a padlock (not included).

Repair kits include a gasket, a piston ring, O-rings, and valves.

			Temp. Range, °F				Intake		Discharge (Hose and Nozzle)
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Hose ID	Hose Lg., ft.	Max. Shackle Dia.		Each
32	55	410	Not Rated	70°	2 NPT	Drum Connector, Vacuum Breaker	1 5/16"	34"	3/4"	8	1/4"	0000000	0000000

Replacement Drum Connector	Each	000000
Replacement Hose	Each	00000
Repair Kit	Each	00000

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

Smooth-Flow Drum Pumps for Oil

Rotate the handle to dispense a continuous flow of liquid.

Removable spouts can be replaced with discharge tube for transfer applications.

Style C pumps dispense exactly one quart of liquid with each rotation of the handle.

Repair kits include components such as gaskets, pistons, and piston valves.

Style A

			Temp. Range, °F				Intake		Discharge (Spout End)
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Pipe Size	Thread Type	Spout Type		Each
11	55	420	Not Rated	300°	2 NPT	Drum Connector	1/2"	40"	3/4	NPT	Removable	000000	0000000
32	15-55	500	Not Rated	180°	2 NPT	3/4" ID × 1" OD × 52" Lg. Polyethylene Tube, Drum Connector	1 1/4"	39 1/2"	__	__	__	0000000	000000

Replacement Hose for Pump with Polyethylene Tube	0000000	Each	000000
Replacement Handle and Crank Arm for Pump with Polyethylene Tube	0000000	Each	00000
Replacement Suction Tube for Pump with Polyethylene Tube	0000000	Each	00000
Replacement Drum Connector for Pump with Polyethylene Tube	0000000	Each	00000
Replacement Pump Head for Pump with Removable Spout	000000	Each	000000
Optional 3/4 NPT × 2 NPT Drum Connector for Pump with Removable Spout	0000000	Each	00000
Optional Crank-Locking Device with Handle for Pump with Removable Spout	0000000	Each	00000
Optional Crank-Locking Device with Label, Locking Pin, and Nut for Pump with Removable Spout	000000	Each	000000

Style B

			Temp. Range, °F				Intake		Discharge (Hose and Nozzle)
Flow Rate, oz./stroke	For Container Size, gal.	Max. Viscosity, cP	Min.	Max.	For Drum Opening Size	Includes	Tube OD	Tube Lg.	Hose OD	Hose Lg., ft.	Drum Pump Type	Spout Type		Each
11	55	420	Not Rated	300°	2 NPT	Drum Connector	1/2"	40"	5/8"	8	Crank Handle	Removable	000000	0000000

Replacement Pump Head	000000	Each	0000000
Replacement Hose	0000000	Each	000000
Replacement Nozzle	0000000	Each	00000
Optional Crank-Locking Device with Label, Locking Pin, and Nut	000000	Each	000000
Optional Crank-Locking Device with Handle	0000000	Each	00000
Optional 3/4 NPT × 2 NPT Drum Connector	0000000	Each	00000

Style C

			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	For Discharge Tube ID	Drum Pump Type		Each
32	15-55	350	40°	120°	2 NPT	Drum Connector	1"	18"-36"	Spout End	3/4"	Crank Handle	0000000	0000000

Repair Kit	0000000	Each	000000
Optional 22"-39" Carbon Steel Telescoping Intake Tube	0000000	Each	00000

Easy-Stroke Drum Pumps for Oil

For low-effort dispensing, these pumps have a lever handle that maximizes output with each stroke. Use them to pump lubricating oil, such as motor oil.

Style B pumps have two removable spouts that are sized to fit a 1" discharge tube. Attach with a clamp.

				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.	For Discharge Tube ID	Spout Type		Each
A	10	30-55	319	60°	100°	2 NPT	Drum Connector	1 3/4"	18"-34"	__	Removable	0000000	000000
A	12	30-55	319	60°	100°	2 NPT	Drum Connector	1 3/4"	18"-34"	__	Removable, Nondrip	0000000	00000
B	18	15-55	4,000	Not Rated	140°	2 NPT	Drum Connector	1 1/2"	18"-35"	1"	Removable, Nondrip	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

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.

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

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About Process Pumps

About Drum Pumps

How to Prime Your Pump

How to Determine Feet of Head

High-Pressure Air-Powered Drum Pumps for Oil

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

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

Drum Pumps for Water and Chemicals

Drum Pumps for Water and Coolant

Nondrip Drum Pumps for Water and Chemicals

Deep-Reach Suction Pumps for Fuel

Drum Pumps for Fuel and Flammable Liquid

Quick-Dispensing Drum Pumps for Fuel

Quick-Dispensing Drum Pumps with Nozzle for Fuel

Drum Pumps for Oil

Smooth-Flow Drum Pumps for Oil

Easy-Stroke Drum Pumps for Oil

Siphon Drum Pumps

Air-Powered Constant-Flow-Rate Pumps