The Best Diaphragm Pumps

Looking for the best diaphragm pumps to buy online? Since there are so many brands offering different types of floor diaphragm pumps on the market, it’s become quite challenging to find the right one for both new and experienced buyers. So, how would you pick the perfect diaphragm pumps for your needs?

To help you make an informed decision, we’ve done our research and compiled a collection of the best-selling diaphragm pumps from Amazon. To make your choice easier, we’ve listed some of the key features of each of these diaphragm pumps. When you make any purchase from links on this page, we may earn an affiliate commission at no additional cost to you.

OUR TOP PICKS

RANK #1 Air Operated Double Diaphragm Pump QBK-15 1/2 inch Outlet 12 GPM Pneumatic Transfer Max 115 PSI Industrial Use for Chemical Waste Oil Dual Dissepiment PTFE Nitrile Rubber by Cast Iron Aluminum Alloy
Air Operated Double Diaphragm Pump QBK-15 1/2 inch...
$175.99
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SaleRANK #2 Graco 1050A (# 647016) 1' Diaphragm Pump, 50 GPM
Graco 1050A (# 647016) 1" Diaphragm Pump, 50 GPM
$889.98
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SaleRANK #3 Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35
Happybuy Air-Operated Double Diaphragm Pump 1 inch...
$249.99
View on Amazon

In the following section, we’ve compiled a collection of the top diaphragm pumps. To make your choice easier, we’ve listed some of the features of each of these diaphragm pumps.

Best Diaphragm Pumps

RANK #1
Air Operated Double Diaphragm Pump QBK-15 1/2 inch Outlet 12 GPM Pneumatic Transfer Max 115 PSI Industrial Use for Chemical Waste Oil Dual Dissepiment PTFE Nitrile Rubber by Cast Iron Aluminum Alloy

Air Operated Double Diaphragm Pump QBK-15 1/2 inch Outlet 12 GPM Pneumatic Transfer Max 115 PSI Industrial Use for Chemical Waste Oil Dual Dissepiment PTFE Nitrile Rubber by Cast Iron Aluminum Alloy

$175.99
View on Amazon
Key Features:
  • 【INDUSTRIAL QBK-15】Material:Cast iron,aluminum alloy,Stainless steel.Inlet Port: 1/2 inch;Outlet Port: 1/2 inch ;Air inlet size: 1/4 inch;Gas Nozzle: 0.32 inch;Max Flow Rate: 2 m3/h (12 GPM);Suction: 16.4 ft (5M);Max Head: 226 ft (69 M);Max PSI: 115 psi.
  • 【EXCELLENT EFFICIENCY】Double diaphragm pump motor design delivers optimum air efficiency.Double Diaphragm:PTFE, Nitrile Rubber and Polychloroprene.
  • 【RELIABILITY】 Diaphragm pump unbalanced air valve ensures no-stall operation.Air diaphragm pump good abrasion resistance, chemical resistance, and heat resistance.
  • 【SAFETY】 Air diaphragm pump bolted construction for leak-free fluid handling.
  • 【VARIOUS INDUSTRIES】Diaphragm pump can petroleum, metallurgy, mining, coating material, printing, paper making, water treatment, automotive and other chemical industries.
SaleRANK #2
Graco 1050A (# 647016) 1' Diaphragm Pump, 50 GPM

Graco 1050A (# 647016) 1" Diaphragm Pump, 50 GPM

$889.98
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Key Features:
  • Flee Flow: 50 GPM
  • Max Air SCFM at 100 PSI: 64
  • Air Inlet: 1/2"
  • Fluid Inlet/Outlet: 1"
SaleRANK #3
Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35

Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35

$249.99
View on Amazon
Key Features:
  • Premium Double Nitrile Diaphragms: Our air-operated double diaphragm pump adopts nitrile diaphragms, durable, corrosion-proof, and long-lasting. Max. Temperature: 150 ℉/66 ℃; Max. Pressure: 120 psi; Max. Flow Rate: 39.6 GPM; Max Head Lift：275.6 ft/84 m.
  • Sturdy & Leak-proof Construction: The diaphragm pump housing is made of aluminum alloy material, bolted against leakage, sturdy, and corrosion-proof for long-time use.
  • Excellent Air-operated Performance: Inlet/Outlet Port Size: 1 inch; Air Inlet Size: FNPT 1/2 inch. A high-quality glyd ring, the double-acting sealing, strengthens air performance.
  • Unique & Professional Designs: Our double diaphragm pump features an externally available air distribution system. The modular air valve is stainless. This low pulsation air valve provides smooth and rapid changeover for increased efficiency and minimizes downtime.
  • Wide Applications: This diaphragm pump can handle various fluids, such as waste oil, alcohol, hydraulic fluid, gasoline, diesel, detergent, drink, and so on. It is widely used in many industries, such as petroleum, metallurgy, mining, coating, printing, water treatment, and automobile.
RANK #4
Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet/Outlet 30GPM Polypropylene Max 120PSI for Chemical and Industrial Use

Happybuy Air-Operated Double Diaphragm Pump 1 inch Inlet/Outlet 30GPM Polypropylene Max 120PSI for Chemical and Industrial Use

$319.99
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Key Features:
  • Premium Double PTFE Diaphragms: Our air-operated double diaphragm pump adopts PTFE diaphragms, durable, corrosion-proof, and long-lasting. Max. Temperature: 150 ℉/66 ℃; Max. Pressure: 120 psi; Max. Flow Rate：79.6 GPM; Max Head Lift：275.6 ft/84 m.
  • Sturdy & Leak-proof Construction: The diaphragm pump housing is made of polypropylene material, bolted against leakage, sturdy, and corrosion-proof for long-time use.
  • Excellent Air-operated Performance: Inlet/Outlet Port Size: 1 inch; Air Inlet Size: FNPT 1/2 inch. A high-quality glyd ring, the double-acting sealing, strengthens air performance.
  • Unique & Professional Designs: Our double diaphragm pump features an externally available air distribution system. The modular air valve is stainless. This low pulsation air valve provides smooth and rapid changeover for increased efficiency and minimizes downtime.
  • Wide Applications: This diaphragm pump can handle various fluids, such as waste oil, alcohol, hydraulic fluid, gasoline, diesel, detergent, drink, and so on. It is widely used in many industries, such as petroleum, metallurgy, mining, coating, printing, water treatment, and automobile.
RANK #5
Cozyel Air-Operated Diaphragm Pump Double Diaphragm Pump 1-1/2 inch Inlet & Outlet, Air Diaphragm Pump Dual Diaphragm Air Pump Aluminum Alloy 44 GPM Max 115PSI, QBK_40L

Cozyel Air-Operated Diaphragm Pump Double Diaphragm Pump 1-1/2 inch Inlet & Outlet, Air Diaphragm Pump Dual Diaphragm Air Pump Aluminum Alloy 44 GPM Max 115PSI, QBK_40L

$286.99
View on Amazon
Key Features:
  • Air-Operated Double Diaphragm Pump 12GPM 1-1/2Inch Inlet And Outlet. The diaphragm pump features an externally serviceable air distribution system and all-bolted construction, with convenient operating, are widely used in various industries, such as petroleum, metallurgy, mining, coating material, printing, paper making, water treatment, automotive etc.
  • A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.
  • Good abrasion resistance and heat resistance.
  • Rugged construction - resists corrosion for reliable performance and long life.Bolted construction is designed for leak-free fluid handling.
  • Easy access to ball checks and fluid caps for maintenance and repairs.
RANK #6
AmazonCommercial Heavy Duty Double Diaphragm Transfer Pump 1/2' Nitrile / NBR / Buna-N - 13GPM / 50LPM Aluminum Air Operated Pneumatic for Diesel, Grease, Kerosene & Oil

AmazonCommercial Heavy Duty Double Diaphragm Transfer Pump 1/2" Nitrile / NBR / Buna-N - 13GPM / 50LPM Aluminum Air Operated Pneumatic for Diesel, Grease, Kerosene & Oil

$331.50
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Key Features:
  • Heavy-duty double diaphragm fuel pump for transferring non-flammable liquids like diesel, kerosene, and oil (note: DO NOT USE for gasoline, bio-diesel, windscreen, or similar chemicals)
  • Self-priming pneumatic pump provides a flow rate of 13GPM (50LPM); ideal for fuel stations, construction sites, textile factories, mining stations, and environmental/water facilities
  • Maximum pressure of 116PSI/8BAR with 1/2-inch inlet/outlets and an air inlet of 1/4-inch NPT; maximum suction height of 10 feet and a maximum head of 164 feet; can accommodate suspended solids up to 1/8-inch wide; great for IBC tanks
  • Compact, lightweight design with durable aluminum body; membrane, o-rings, seals, and elastomers are made of durable Nitrile/NBR/Buna-N material
  • Mount upright for safety; measures 9 by 6.7 by 11.6 inches; weighs 12 pounds; backed by an AmazonCommercial 1-year limited warranty
SaleRANK #7
Hypro D30 Diaphragm Pump

Hypro D30 Diaphragm Pump

$569.99
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Key Features:
  • Max. 9.5 gpm ; Max. 580 psi , Max. 550 rpm ; Max. 140 deg. F
  • Ports: 1" HB inlet, 1/2" HB outlet
  • Two diaphragm pump
  • Flanged for shaft kit
  • CW and CCW rotation
RANK #8
ALL NEW SEAFLO 55-Series Diaphragm Pump - 12V DC, 5.5 GPM, 60 PSI with HEAVY DUTY PRESSURE SWITCH

ALL NEW SEAFLO 55-Series Diaphragm Pump - 12V DC, 5.5 GPM, 60 PSI with HEAVY DUTY PRESSURE SWITCH

$129.99
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Key Features:
  • ALL NEW Heavy Duty Pressure Switch
  • 12 Self Priming On Demand Water Pressure Pump
  • 5.5 GPM and 60 PSI
  • Ignition protected and thermally protected
  • 4 Year Warranty
RANK #9
Water Diaphragm Self Priming Pump 3.0 Gallons/min (11.3 Lpm) 45 PSI New Rv / Marine 12 Volt Dc / 12 V Demand Fresh

Water Diaphragm Self Priming Pump 3.0 Gallons/min (11.3 Lpm) 45 PSI New Rv / Marine 12 Volt Dc / 12 V Demand Fresh

$59.90
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Key Features:
  • (1)Diaphragm Pump,(1) set of instructions,(2) 1/2" barbed hose adaptors,(1) 50 mesh inlet strainer
  • 3.0 Gallons Per Minute capacity flow, and 45 PSI pressure setting
  • Self priming, smooth, silent operation and can run dry without damage
  • Voltage: 12 VDC Dimensions: 7.84" X 5.00" X 4.62" Amps: 3.0 (6.0 Max. Amps)
  • 4-Year Warranty
RANK #10
Cozyel 12 GPM Air-Operated Air Diaphragm Double Diaphragm Pump Cast Iron 115 PSI, Dual Diaphragm Air Pump Petroleum Fluids 1/2 inch Inlet/Outlet QBK-15

Cozyel 12 GPM Air-Operated Air Diaphragm Double Diaphragm Pump Cast Iron 115 PSI, Dual Diaphragm Air Pump Petroleum Fluids 1/2 inch Inlet/Outlet QBK-15

$148.98
View on Amazon
Key Features:
  • Air-Operated Double Diaphragm Pump 12GPM 1/2Inch Inlet And Outlet. The diaphragm pump features an externally serviceable air distribution system and all-bolted construction, with convenient operating, are widely used in various industries, such as petroleum, metallurgy, mining, coating material, printing, paper making, water treatment, automotive etc
  • A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.
  • Rugged construction - resists corrosion for reliable performance and long life.Bolted construction is designed for leak-free fluid handling.
  • Good abrasion resistance and heat resistance.
  • Easy access to ball checks and fluid caps for maintenance and repairs.
RANK #11
Hypro D30 Diaphragm Pump with 9910-GS40GI Pressure Regulator (Bundle, 2 Items)

Hypro D30 Diaphragm Pump with 9910-GS40GI Pressure Regulator (Bundle, 2 Items)

$679.02
View on Amazon
Key Features:
  • Bundle includes 2 items: (1) Hypro D30 Diaphragm Pump with (1) 9910-GS40GI Pressure Regulator
  • Max. Flow: 9.6 GPM ; Max. Pressure: 580 PSI ; Max. Speed: 550 RPM ; Max. Fluid Temperature: 140° F
  • Port Sizes: 1" HB inlet, 1/2" HB outlet ; Flanged for shaft kit
  • 2 semi-hydraulic diaphragms ; CW and CCW pump shaft rotation
  • 9910-GS40GI Pressure Regulator: Max. 21 gpm ; Max. 580 psi
RANK #12
SEAFLO 110V 3.3 GPM 45 PSI Water Diaphragm Pressure Pump - 4 Year Warranty!!! with Plug for Wall Outlet

SEAFLO 110V 3.3 GPM 45 PSI Water Diaphragm Pressure Pump - 4 Year Warranty!!! with Plug for Wall Outlet

$109.99
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Key Features:
  • 4 Year Warranty from Authorized Seaflo USA Dealer!!!
  • 3.3 Gallons Per Minute flow, 45 psi Self Priming
  • Includes standard three prong outlet plug
  • 1/2" Threaded NPT Inlet/Outlet - includes 1/2" Barbed Hose Adapters - Mesh Inlet Strainer
  • 110V AC Current Draw .75 amps (1.2 Max Amps)
RANK #13
Northstar NSQ Series 12V On-Demand Sprayer Diaphragm Pump - 5.5 GPM

Northstar NSQ Series 12V On-Demand Sprayer Diaphragm Pump - 5.5 GPM

$159.99
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Key Features:
  • Automatically turns off when no flow is required to conserve battery power
  • Unique pressure switch design slowly cycles the pump for reduced switch and motor wear
  • Patented DXS-3 valves are made with chemical-resistant Viton for faster priming, better performance and longer life
  • Santoprene diaphragm for reliability and longer life
  • Innovative smooth valve design for faster priming and longer life
RANK #14
GRACO 647731 Husky 1050 1' Diaphragm Pump for Oil Evac & Transfer

GRACO 647731 Husky 1050 1" Diaphragm Pump for Oil Evac & Transfer

$1,095.00
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Key Features:
SaleRANK #15
Chapin International 6-9206 12V/1.0 GPM Diaphragm Pump,Black

Chapin International 6-9206 12V/1.0 GPM Diaphragm Pump,Black

$23.99
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Key Features:
  • Self priming and self starting, can run dry without damage
  • No shaft or seals to replace with the diaphragm design
  • Chemical-resistant elastomer
  • Replacement pump for most ATV sprayers with a universal mounting base
  • Designed and engineered in the USA
RANK #16
Blue Diamond Pumps ET100+ Plus - Septic or Pond Linear Diaphragm Air Pump with Free Additional Air Filter, Grey

Blue Diamond Pumps ET100+ Plus - Septic or Pond Linear Diaphragm Air Pump with Free Additional Air Filter, Grey

$232.00
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Key Features:
  • Free additional air filter replacement
  • All Aluminum Air Pump Chasis
  • UL, TUV and CE approved.
  • Used by original equipment manufacturers of NSF certified residential sewage treatment systems.
  • 2 YEAR MANUFACTURER WARRANTY - MADE TO LAST: In addition to being weatherproof, this durable pump features a specially formulated material for its linear diaphragm. Constructed to last, the pump has a 2 year warranty from its manufacturer.
RANK #17
Hypro D30GRGI Diaphragm Pump

Hypro D30GRGI Diaphragm Pump

$1,084.69
View on Amazon
Key Features:
  • Includes 9910-GS40GI Regulator and Gearbox
  • Max. 9.5 gpm ; Max. 580 psi ; Max. 3600 RPM ; Max. 140 deg. F
  • 1" HB inlet, 1/2" HB outlet
  • CW and CCW rotation
  • Two diaphragm pump
RANK #18
SEAFLO 53-Series Water Pressure Diaphragm Pump - 12V DC, 7.0 GPM, 60 PSI

SEAFLO 53-Series Water Pressure Diaphragm Pump - 12V DC, 7.0 GPM, 60 PSI

$199.99
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Key Features:
  • 12 Volt, 7.0 GPM, 60 PSI positive displacement pump
  • Self-Priming and capable of run dry operation
  • Continuous duty motor
  • Built-in relay switch
  • 4 Year Warranty comes standard on all SEAFLO products
RANK #19
NorthStar NSQ Series 12V On-Demand Sprayer Diaphragm Pump - 7 GPM, Turns Off at 60 PSI

NorthStar NSQ Series 12V On-Demand Sprayer Diaphragm Pump - 7 GPM, Turns Off at 60 PSI

$289.99
View on Amazon
Key Features:
  • Automatically turns off when no flow is required to conserve battery power
  • Honeywell MICRO SWITCH for enhanced durability and efficiency
  • Patent-pending DXS-3 valves are made with chemical-resistant Viton for faster priming, better performance and longer life
  • Santoprene diaphragm and Viton valves for reliability and longer life
  • Innovative smooth valve design for faster priming and longer life
RANK #20
Everflo EF7000-BOX 7.0 GPM 12V Diaphragm Pump-1/2 FNPT Ports, Black

Everflo EF7000-BOX 7.0 GPM 12V Diaphragm Pump-1/2 FNPT Ports, Black

$214.99
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Key Features:
  • 12V pump that can handle up to 7.0GPM & 60 psi
  • Self priming up to twelve feet
  • Approved For use with Round-Up and other agricultural brand herbicides and insecticides
  • Fiberglass-reinforced polypropylene pump manifold with ½” FNPT Port
  • Standard mounting pattern to fit most sprayer tanks
  • Replacement 12 Volt diaphragm pump for variety of makes and models
  • Ce approved
  • Can be used for other fluid transfer applications
  • Corrosion resistant Viton valves and Santoprene diaphragm
  • 12 volt wire harness sold separately. Please read the user manual before use.

So, that’s all of the best-selling diaphragm pumps you can consider buying for your needs. If you are still confused about choosing the right diaphragm pumps, feel free to check the following buying guide:

How to Choose the Right Diaphragm Pumps?

If you are in the market for choosing the good-performing diaphragm pumps, you will find a wide variety of options there. As a result, finding the right diaphragm pumps is a little tricky. You may need to consider the following factors before choosing the right diaphragm pumps for your needs:

Quality of the Product

When shopping for diaphragm pumps, it’s important to look for the highest quality. If you want to have diaphragm pumps that will last for years, you should never comprise the quality of the product. Make sure it is made of top-quality material and will provide most of the features you may require. Diaphragm Pumps that are made using heavy-duty construction are the best choice for anyone.

Performance & Features

Before shopping for the best diaphragm pumps, you should make sure what features you may require from that particular product. You may find a lot of options to choose from but always try to pick the right diaphragm pumps that will fulfill most of your requirements. The performance of the diaphragm pumps should also fulfill your demands.

Brand

It’s always good to invest in diaphragm pumps from renowned brands. However, there are still some new brands that offer good quality diaphragm pumps at a very reasonable price.

Price

How much you are going to pay for the diaphragm pumps? It’s better to invest in a top-quality diaphragm pumps. However, better quality doesn’t mean a higher price. If you are on a tight budget, you can still find a good-performing diaphragm pumps within your budget. Never invest in a cheap and poorly manufactured diaphragm pumps.

Frequently Asked Questions

What is the Best Diaphragm Pumps to Buy?

There are several diaphragm pumps that you can consider buying for your needs. We’ve already listed some of the most popular diaphragm pumps so that you can compare them and pick the right one for your needs.

Where to Buy Diaphragm Pumps Online?

You can buy diaphragm pumps from several online marketplaces including Amazon, eBay, Walmart, etc. You can also buy diaphragm pumps directly from the manufacturer’s website. However, It’s better to buy from Amazon as you can get special discounts there.

Final Words

We hope you enjoyed our article about the best diaphragm pumps. When buying, make sure to read the features and specifications of each of the diaphragm pumps and pick the right one that fulfills most of your requirements.

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