Top 10 Best Diaphragm Pumps of 2021 Review** **

There are many reasons why you may need a diaphragm pump. Diaphragm pumps are used for marine applications, RV’s, campers, vans, spray rigs, and much, much more. Once you know what output is necessary to handle your job’s workload, your next job is to pick a quality pump, so that you don’t get a pump that is poorly manufactured, and so that you don’t end up having to replacing your pump right after you buy it. We know that pumps aren’t always in the easiest spot to get to, and we know that in some cases, you will need a pump that will resist corrosion and chemicals, due to conditions you can’t control. As consumers, we know how frustrating it is when you waste your money on something, just to have it not work properly, or not last. We have put a list together of the best diaphragm pumps on the market for quality and dependability, in an attempt to take some of the guesswork of getting a quality pump, and clearly define the benefits for you of each one. Hopefully, our research will allow you to see all of the best diaphragm pumps together on the same page, and decide which diaphragm pump will suit your needs the best. Enjoy!


Table of Contents

Comparison Table:

10. HQMaster Diaphragm Pump DC 12V 70W 6L/Min

HQMaster Diaphragm Pump DC 12V 70W 6L/Min 130PSI Self Priming High Pressure Water PumpGet it now on

The HQMaster Diaphragm Pump DC 12 V 70 W 6 L/Min is rated 5 stars, quiet, and effective. The HQMaster is easy to install, has a low power consumption, and is the perfect multi-use pump. This pump will perform well with residential applications, like sprinklers and showers, and it will work great in a boat, RV, or in a spray rig for agricultural applications as well. 130 PSI and a 1.3 Gallons per minute output, and the HQMaster pump offer self-priming and a totally sealed outer shell that maintains a high stable pressure, making it an excellent candidate for jobs where you are always spraying and calibrating, or measured applications that have to be precise.


Maximum Suction Height – 9 Meters

Pump Body Material -ABS

Max Pressure – 130 PSI

Package Includes:

  • 1 X Diaphragm Pump
  • 1 X High Pressure Tube
  • 1 X Filter Net
  • 2 X Screw Cap


An excellent quality pump for spray rigs, pressure washers and more, the HQMaster Diaphragm Pump is designed to be durable, strong, and effective. Customers love this pump because it is strong, consistent, and very quiet. The HQMaster Diaphragm Pump works fine with spray rigs using chemicals, and all HQMaster pumps are tested before they are sold, to ensure that you get what you pay for. HQMaster is considered a top manufacturer of quality pumps, and has years of expertise, meaning you will have fewer chances of having to redo your work anytime soon.

9. FUELWORKS Heavy Duty Air-Operated Aluminum Diaphragm Pump

Fuelworks Double Diaphragm Transfer Pump 1/2' Viton - 12GPM / 45LPM Heavy Duty Polypropylene Air...Get it now on

The FUELWORKS Heavy Duty Air-Operated Aluminum Diaphragm Pump is made with the best materials, and many people and businesses across the US depend on FUELWORKS. the Heavy Duty Air-Operated pump features an extremely serviceable air distribution and an all bolted construction for durability. Body material is made from Polypropylane, and the pump is designed to work well with gas, diesel, grease, kerosene, urea, and much more. Here are a few features:


Maximum Suction Height – 10 feet/ 3 meters

Pump Body Material – Polypropylane

Max Pressure – 15 PSI/8 BAR

Package Includes:

  • 1 X FUELWORKS Heavy Duty Air-Operated Aluminum Diaphragm Pump


FUELWORKS has been around since 1992 designing, manufacturing, and distributing lubrication and fuel transfer equipment. FUELWORKS is considered to be a leading manufacturer of fuel and UREA/DEF (agricultural) transfer equipment. They improve the quality of products every year through research and development, and they stay competitive in the marketplace. This is an excellent pump and it should suit any needs just fine. This pump is loved by customers and made by a very reputable manufacturer.


Seaflo 12V WATER PRESSURE DIAPHRAGM PUMP 4.5GPM 17 L/MIN 40 PSI Caravan/RV/Boat/MarineGet it now on

This is a great pump for sinks, taps, showers, toilets, or other applications where water transfer is needed. It is ranked high by previous owners, suitable for holding tank water systems, like in boats. RV’s or campers. There are a dampening bypass control and semi-rigid rubber feet to reduce noise and create a very quiet operation with little or no vibration. Self-priming, meaning it can run dry as well, and the Seaflo Water Pressure pump will give you a steady 4.5 GPM flow, at 40 PSI, and can it be mounted anywhere easily, and is built to last. This pump is designed to work efficiently at all types of uses including agricultural rigs and is built for durability and dependability.


Maximum Suction Height – 6 feet

Pump Body Material – Santoprene

Max Pressure – 4.5 Gallons per minute

Package Includes:

  • 1 X 12v Diaphragm Pump
  • 1X High Flow Mesh Filter w/ 1/2β€³ Barbed End
  • 1 X Straight 1/2β€³ Barbed Fitting
  • 1 X 90Β° degree 1/2β€³ Barbed Fitting -(1) 1/2β€³ Male NPT Threaded Fitting


The Seaflo 12V WATER PRESSURE DIAPHRAGM PUMP is designed to run on water systems with no accumulator tank present, and it can run up to five fixtures. This pump contains a built-in pressure switch, that shuts it off automatically when the faucet is opened and closed. The Water Pressure Diaphragm Pump is easy to install, with Quick Attach Connections, and 360 degree connections, and is easy to service and winterize as well. Seaflow is trusted as the worldwide manufacturer who specializes in quality micropumps, blowers, pressure system, sprayers, and more, and they pull out all the stops to ensure that they deliver precision, long lasting products.

7. bayite 12V DC Fresh Water Pump with 2 Hose Clamps 12 Volt Diaphragm Pump

bayite 12V DC Fresh Water Pump with 2 Hose Clamps 12 Volt Diaphragm Pump Self Priming Sprayer Pump...Get it now on

The bayite 12V DC Fresh Water Pump with 2 Hose Clamps 12 Volt Diaphragm Pump Self Priming Sprayer Pump with Pressure Switch is good for use in lawns, showers, water taps, boats, caravans, campers, and more. The motor incorporates precision ball bearings, for long life, and the motor is equipped with an internal thermal breaker, to prevent overheating. Sealed switches finished with an Electro Coating to prevent corrosion, and soft rubber feet, giving cushion from vibration. As a freshwater pump, this pump will last years and years and is designed to operate very quietly.


Maximum Suction Height – 6.6 Feet

Pump Body Material – Unknown

Max Pressure – 100 PSI

Package Includes:

  • 1 x Diaphragm Water Pump
  • 2 x Hose Clamps


Designed to be a quiet running fresh water pump that will stay out of the way, unnoticed and last for years to come, the bayite 12V DC Fresh Water Pump stays quiet during all modes of operation, while drawing very little current. This pump, in combination with a low back pressure water system, will exceed your expectations, and the diaphragm has a built-in pressure switch, cutting it off when you are not using it. Customers recommend this pump highly and it is said to work like a charm.

6. SHURflo On-Demand Diaphragm Pump Model# 8000-543-236

Pentair SHURflo 8000-543-236 Automatic-Demand Diaphragm Pump, 1.8 GPM With Viton Valves, Santoprene...Get it now on

Perfect for boats, RV’s and campers, the SHURFLO On-Demand Diaphragm pump has been known to run for a very long time, and handle the heavier jobs like agricultural spraying and transfer applications effortlessly. This pump mounts in any position and the outside is made to resist corrosion and chemicals. Self-priming, allowing carefree mounting and running without supervision, and a repairable pump body to ensure that your pump will last for years to come.


Maximum Suction Height – 5 ft

Pump Body Material – (Viton) valves and Santoprene diaphragm with a Polypropylene construction

Max Pressure – 60 PSI

Package Includes:

  • 1 X SHURFLO On-Demand Diaphragm Pump


SHURFLO 8000 pumps are the most widely used industrial pumps, and customers are all saying that they are very reliable and long lasting. Made to be super quiet and get the job done, the SHURFLO On-Demand Diaphragm pump can handle tough jobs effortlessly, this pump is approved to be used with herbicides and insecticides, and it mounts in any position for easy installation. This is the perfect pump for spraying applications, pools, vineyards, etc., and SHURFLO has made a name for themselves since 1968 for delivering amazing quality products catered specifically for their customer’s needs.

5. REALFLO 12V Water Pressure Diaphragm Pump 4.5GPM 17L/min

REALFLO UPGRADE 12V Water Pressure Diaphragm Pump 4.5GPM 17L/min 40Psi Caravan/RV/Boat/MarineGet it now on

The REALFLO 12V Water Pressure Diaphragm Pump is best for campers, boats, and vans, with 40 PSI and a pressure switch so that is cut off when you are not using it. Self-priming, so it can be mounted above the tank where it’s dry. This pump features a built-in thermal protector to prevent overheating, and pumps at a total of 4.5 gallons per minute, to handle just about any pumping job you need it for. 4.5 star rated by previous buyers and customers are saying that it works very well for a shower system.


Maximum Suction Height – 3 meters

Pump Body Material – Santoprene diaphragm with a Polypropylene construction

Max Pressure – 40 PSI

Package Includes:

  • Inlets/outlets:
  • 3/4β€³Pagoda-Type 90 degree Bending joint
  • 3/4β€³Thread-Type 90 degree Bending joint
  • 3/4β€³Pagoda-Type straight joint
  • The filter: 3/4 ” joint, thread


With low noise output and a sturdy base, this REALFLO pump is about 4 inches longer than other pumps in its class. Designed to be the ideal pump for campers, RV’s and vans, and a champ at marine applications, the REALFLO 12V Water Pressure Diaphragm Pump has an automatic start, and overheating protection. This pump is self-priming, so it can run dry without damaging the pump and allows easy installations. Customers are happy, and these pumps are built to last by a leading and trusted manufacturer that sets out to be the best in the industry and pulls it off. REALFLO is a known quality source for solid pumps.

4. SHURFLO 2088-594-144 Delivery Pump

SHURFLO 2088-594-144 Delivery PumpGet it now on

The SHURFLO 2088 Delivery pump will prevent backflow of fluid through the pump, and it contains an open flow and self-priming mechanism, for flawless and worries free operation. 3.0 gallon per minute flow rate, a half inch – 14 male parallel thread ports, and 45 PSI demand switch for automatic cutoff. This pump is strong and built to last, by an industry leader that cares.


Maximum Suction Height – 7ft

Pump Body Material – Polypropylene, EPDM, and Santoprene

Max Pressure – 4.0 GPM

Package Includes:

  • 1 X SHURFLO 2088-594-144 Delivery Pump


The SHURFLO 2088-594-144 Delivery Pump is a top-of-the-line product, built for a variety of transfer and dispense on-demand applications. (spray rigs, etc.) This pump can be mounted in any position and is designed to deliver reliable performance for high flow moderate pressure applications. Manufactured by SHURFLO, a company that specifically designs all types of pumps for its ever-growing customer base. SHURFLO is part of a bigger company called Flow Technologies Group of Pentair, Inc. (PNR), a multi-billion-dollar corporation. Their one main goal… is customer satisfaction. They deliver superior quality, innovative designs, and pumps that are designed to last for years to come.

3. SHURFLO 8005-733-255 Diaphragm Pump

Shurflo 8005-733-255 Diaphragm PumpGet it now on

The SHURFLO 8005-733-255 Diaphragm Pump has a 1.5 gallon per minute flow rate, 3/8β€³ NPT female ports, and a built-in check valve. 45 PSI into internal bypass, and it is both NSF and CSA listed. This pump can be mounted in any position, and is designed to last a long time, and maintain its integrity and reliability throughout the years. This is an excellent pump for any applications that require high pressure.


Maximum Suction Height – 8ft

Pump Body Material – Polypropylene, EPDM, and Santoprene

Max Pressure – 60 PSI

Package Includes:

  • 1 X SHURFLO 8005-733-255 Diaphragm Pump


SHURFLO pumps are the most widely used industrial pump. SHURFLO started out in 1968 and has since crowned their industry as the leading manufacturer of top quality products, with worldwide dominance across multiple markets. All of SHUFLO pumps are NSF and CSA certified and manufactured using the best materials available to ensure that their customers will get years and years of use out of their products. This diaphragm pump is rated highly by previous buyers, and built to last. Quiet operation, easily mountable and low maintenance is what you can expect from the 8005 Diaphragm Pump, and the outer casing is resistant to chemicals and corrosion as well.

2. NorthStar NSQ Series 12V On-Demand Diaphragm Pump

NorthStar NSQ Series 12V On-Demand Diaphragm Pump - 7 GPM, Turns Off @ 60 PSIGet it now on

NorthStar NSQ Series 12V On-Demand Diaphragm Pump will automatically turn off when there is no flow to conserve power. The patented DXS – 3 valves are made with the chemical resistant material, and there is a smooth valve design incorporated for faster priming and overall longer life. A Honeywell MICRO SWITCH is incorporated for extra-long durability and efficiency, and this product is five-star rated by his previous owners and said to be one of the best pumps around.


Maximum Suction Height – 12 ft

Pump Body Material – Fiberglass reinforced polypropylene

Max Pressure – 60 PSI

Package Includes:

  • 1 X NorthStar NSQ Series 12V On-Demand Diaphragm Pump


With a hundred percent continuous duty rating and no cooldown required, you couldn’t pick a better pump for your spray rig. The NorthStar NSQ Series will pump at 7 GPM, turns off at 60 PSI, and is designed for industrial and commercial applications. Compatible with Roundup and other insecticides, this pump is built to be long-lasting, durable, and to mount in any position; to give you a variety of mounting options. Don Kotula, founder of Northern Tool + Equipment grew up with his father as a hard worker, then added a business degree to the mix and some knowledge of hydraulics, and took off in his industry. Now a leader across multiple industries, Northstar pumps are built by one of the most prestigious manufacturers in the industry. In terms of quality, you can’t find a better pump for your spray rig, but this pump will also work for multi-purpose applications such as showers, RV’s, boats, etc.

1. SHURFLO 2088-594-154, 2088 Series, 198 GPH, 115 VAC Diaphragm Industrial Pump

SHURflo Industrial Pump - 198 GPH, 115 Volt, 1/2in, Model# 2088-594-154Get it now on

The SHURFLO 2088 Series pumps deliver excellent performance and high flow for moderate pressure applications. This is the ideal pump for a variety of spraying and transfer applications that require flows of up to 4.0 GPM. All SHURFLO pumps have a chemically resistant exterior, and they can be mounted in any position. The SHURFLO 2088 Series is a UL Recognized, CSA, NSF certified industrial diaphragm pump that is designed to get the job done and keep you running.


Maximum Suction Height – 9ft

Pump Body Material – Polypropylene & Santoprene

Max Pressure – 45 PSI

Package Includes:

  • Shurflo 2088-594-154, 2088 Series, 198 GPH, 115 VAC Diaphragm Industrial Pump


This SHURFLO 2088 series pump is 4.1 star rated by previous buyers and a favorite of many designed for durability and dependability. SHURFLO has been around for over 25 years manufacturing top-quality products deliberately to suit the needs of their customers, and there is no question that they deliver. They are the dominant supplier worldwide of marine pumps and accessories, and are reputable across multiple industries, meaning that they work hard to hand us only the finest quality products, every time.

Final Thoughts

The best diaphragm pumps were very easy to identify. In this market, there are a few industry leaders that stand out. They stand out on Amazon, where they are highly rated, and they stand out in the reviews, where customers are bragging after they get the pumps hooked up about how good they are. They stand out on their websites as well, where they can convey their mission, history, and success story with the world, as well as what they go through in the factory to deliver us the best products and assure quality with each purchase. All of the pumps on this list will perform in a multitude of applications, and they are all regarded as top quality pumps, made with materials and parts that are the best available in terms of quality and durability. Our favorite brand is SHURFLO, and most would agree that their products are at the top of their class, but any one of these pumps comes from a manufacturer that understands our needs and goes out of their way to fill them. If you end up deciding to go with one of the diaphragm pumps on our top 10 list, we have no questions that you will be making a wise investment. Thanks for stopping by!


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