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  • SEAFLO 55 Series 12V RV Water Pump 5.5 GPM 60 PSI Diaphragm Pump Heavy Duty Pressure Switch Built In Bypass Self Priming Quiet High Flow RV Marine Off Grid Freshwater System 4-Year Warranty
  • SEAFLO 55 Series 5.5 GPM Water Pressure PumpMarineNow
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SEAFLO 55 Series 12V RV Water Pump 5.5 GPM 60 PSI Diaphragm Pump Heavy Duty Pressure Switch Built In Bypass Self Priming Quiet High Flow RV Marine Off Grid Freshwater System 4-Year Warranty

4.2 out of 5 stars (1,852)

$119.99
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Style: 5.5 GPM - 60 PSI
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About this item

  • [ SPECIFICATIONS ]: Model: SFDP1-055-060-55 | Voltage: 12V DC | Flow Rate: 5.5 GPM (20.8 LPM) | Shut Off Pressure: 60 PSI (4.2 BAR) | Suction Lift: 9 ft (2.7 m) | Max Draw: 17A | Ports: 1/2 in MNPT Threaded | Materials: EPDM valves Santoprene diaphragm | Max Temp: 140°F (60°C) | Intermittent Duty | Warranty: 4 Years
  • [ 4 YEAR WARRANTY ]: Backed by SEAFLO’s 4 Year Limited Warranty, this pump is built for long term reliability and peace of mind in demanding freshwater systems. Designed for daily use in RVs, boats, cabins, and off grid installations, it provides dependable performance where consistent water delivery is essential for comfort and functionality.
  • [BUILT TO NSF UL Standards FOR RV POTABLE WATER ]: Built to NSF/ANSI/CAN 61 & 372 (Potable Water Safety), NSF 24 (RV Plumbing), and UL 778 (Motor-Operated Water Pumps) Safe for drinking water and compliant with RV and marine plumbing standards across North America.
  • [ HIGH FLOW 5 CHAMBER DESIGN ]: Advanced five chamber diaphragm construction delivers strong output up to 5.5 GPM while reducing rapid cycling compared to smaller pumps. This allows simultaneous use of multiple fixtures such as showers, faucets, and washdown hoses while maintaining stable pressure and smoother water delivery.
  • [ HEAVY DUTY PRESSURE SWITCH WITH BYPASS ]: Integrated smart pressure switch automatically starts and stops the pump based on water demand, while the built in bypass stabilizes pressure and reduces frequent on off cycling. This improves system efficiency, extends service life, and delivers more consistent performance across varying flow conditions.
  • [ SELF PRIMING RUN DRY CAPABLE ]: Capable of self priming up to 9 ft, the pump can be mounted above the water source without losing performance. Run dry capability protects internal components during temporary water shortages or tank depletion, making it highly reliable for mobile systems and remote installations.
  • [ QUIET LOW VIBRATION OPERATION ]: A semi rigid rubber mounting base isolates vibration and reduces operating noise, making the pump suitable for enclosed compartments such as RV cabinets or boat lockers. This quieter performance improves onboard comfort while still delivering the high flow output required for everyday use.
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This item: SEAFLO 55 Series 12V RV Water Pump 5.5 GPM 60 PSI Diaphragm Pump Heavy Duty Pressure Switch Built In Bypass Self Priming Quiet High Flow RV Marine Off Grid Freshwater System 4-Year Warranty
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Product description

SFDPA1-033-045-33

The SEAFLO 55-Series Diaphragm Pump is designed to meet the demanding needs of your water system, providing consistent and reliable performance in a wide range of applications, including RVs, boats, yachts, water purification systems, and more.

Premium Technical Specifications

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Robust Construction

Intermittent

the SEAFLO 55-Series ensures precise pressure control, stable performance, and reduced cycling,. Constructed with premium materials like Santoprene and EPDM, this pump is built to withstand the harsh conditions of marine and RV environments, offering long-lasting reliability.

Maximum Versatility

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High flow rate, robust suction power, and durable construction make it suitable for both freshwater and saltwater environments , The SEAFLO 55-Series delivers consistent and reliable performance across a wide range of applications.

55 Series vs Other SEAFLO Pumps

55-Series Diaphragm Pump

21-Series Diaphragm Pump

22-Series Diaphragm Pump

33-Series Diaphragm Pump

42-Series Diaphragm Pump

56A-Series Diaphragm Pump

53-Series Diaphragm Pump

Customer Reviews
4.2 out of 5 stars 1,852
4.4 out of 5 stars 1,842
3.7 out of 5 stars 25
4.4 out of 5 stars 2,223
3.7 out of 5 stars 145
Price
$119.99 $32.99 $139.99
Model Number
‎SFDP1-055-060-55 SFDP1-012-035-21 SFDP1-013-100-22 SFDP1-030-045-33 SFDP1-030-055-42 SFDP1-050-070-56A SFDP1-070-060-53
Open Flow (GPM/LPM)
5.5 / 20.8 1.2 / 4.5 1.3 / 5.0 3.0 / 11.3 3.0 / 11.3 5.0 / 18.9 7.0 / 26.5
Voltage
12V 12V 12V 12V 12V 12V 12V
Max Draw
17A 4.0A 6.0A 6.74A 7.0 A 10A 24.5A
Shut-off Pressure (PSI/BAR)
60 / 4.2 35 / 2.4 100 / 6.9 45 / 3.1 55 / 3.8 70 / 4.8 60 / 4.2
Priming Capabilities
9 FT (2.7M) suction lift 4 feet (1.2 m) suction lift 6 feet (1.8 m) suction lift 6 feet (1.8 m) suction lift 6 feet (1.8 m) suction lift 6 feet (1.8 m) suction lift 9 FT (2.7M) suction lift
Max Recommended Temperature:
140° F (60° C) Max. 140° F (60° C) Max. 140° F (60° C) Max. 140° F (60° C) Max. 140° F (60° C) Max. 140° F (60° C) Max. 140° F (60° C) Max.
Material:
EPDM (Valves) EPDM (Valves) EPDM (Valves) EPDM (Valves) EPDM(Valves) EPDM (Valves) EPDM (Valves)
Ports:
1/2"-14 MNPT Threaded 3/8" hose Barb 3/8" hose Barb 1/2"-14 MNPT Threaded 1/2"- MNPT Threaded Quick Attach Quick Attach
Fixtures Quantity
Up to 6 1 1 3-4 Up to 4 Up to 6 Up to 8
Duty Cycle
Intermittent Intermittent duty Continuous Duty Continuous duty Intermittent Continuous Duty

Product information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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SEAFLO 55 Series 12V RV Water Pump 5.5 GPM 60 PSI Diaphragm Pump Heavy Duty Pressure Switch Built In Bypass Self Priming Quiet High Flow RV Marine Off Grid Freshwater System 4-Year Warranty


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Customer reviews

4.2 out of 5 stars
1,852 global ratings
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Customers say

Customers find this water pump to be the best 12V pump on the market, with good pressure and flow, and appreciate its quiet operation. The installation process is straightforward, and they like its quality. However, durability is a concern as multiple customers report it breaking after 2 months or motor failure within a year. Additionally, the pressure switch receives mixed feedback, with several customers reporting issues with it.
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130 customers mention quality, 103 positive, 27 negative
Customers praise the water pump's quality, describing it as the best 12V pump on the market and a great replacement option.
Great pump, come with filter and ready to install with instructions, perfectly and securely boxed to prevent damage. Very satisfied!Read more
This is a great product. Also it was very easy to install!Read more
Good pump. I’ve had it for a couple of months and it’s working greatRead more
Terrible product. Broke after a week or so of use. They sent replacement parts and that didn't work either. Leaked all the time....Read more
82 customers mention water pressure, 67 positive, 15 negative
Customers are satisfied with the water pump's performance, reporting good pressure and flow rate when running, with one customer noting that the pressure is adjustable.
...This pump motor is the best so far and has great pressure. But there is a major flaw with this item. It is the pressure switch....Read more
good pressure and volume for a 12 Volt pump I use it to transfer water from a portable tank to feed my power washer and it supplies what I need to...Read more
...I had to go by a bypass valve and Tractor Supply. Strong pump though. Pumps a lot of water.Read more
It was easy to install. It worked great. We had great water pressure. Then went on a trip and the $130.00 pump BROKE 3 months after installation....Read more
68 customers mention noise level, 50 positive, 18 negative
Customers appreciate that the water pump operates quietly.
I've had several pumps like this through the years. This one is quiet, strong and provides a lot of water pressure for my boat deck wash system.Read more
...Motor and pump seem very well built. And very quiet when compared to other name brands I have been using for 7 years on this home.Read more
The pump pushed a lot of water, was loud, and died without any real indication. The thing was a power hog....Read more
...Things i like: 1. it’s quite. 2. It seems to be built very well. Things i don’t like: 1. It is not a variable speed pump....Read more
56 customers mention water flow, 45 positive, 11 negative
Customers are satisfied with the water flow of the pump, noting it moves good volume of water and has a lot more pumping capacity.
...pumps over the years, this is the first time it has been quiet and powerful. An unbelievable bargain for the money. Right on keep up the good work.Read more
Great pump! Moves a lot of water. A bit noisy but it does the job well. Am using with my rain water harvesting system.Read more
High flow, easy to install, and much quieter than most of our other rv pumps. We have several of these around our ranch....Read more
...Strong pump though. Pumps a lot of water.Read more
38 customers mention installation, 34 positive, 4 negative
Customers find the water pump easy to install, with one customer noting that the new fittings make installation and removal simpler.
It was easy to install. It worked great. We had great water pressure. Then went on a trip and the $130.00 pump BROKE 3 months after installation....Read more
Easy install ,not much difference in the noise from old pump . Works fine and seams to have more pressure...Read more
...it makes sense to consider the potential benefits of an easy to install pump like this.Read more
Installed easily. Used as saltwater rinse down on center console boat. After 2 months, the system failed to turn on....Read more
233 customers mention reliability, 119 positive, 114 negative
Customers have mixed experiences with the water pump's reliability, with some reporting it works well, particularly at high pressure, while others mention it stops working or quits pumping altogether.
...Works great, fills the bowl well. Much better alternative than the Raritan external water pump.Read more
...I used it 2 times and it quit working. If i tap on it it will work but when you turn it back on you have to tap on it again to make it run....Read more
Works well but not as powerful as I expectedRead more
The pump worked well for a little over 2 years. Recently stopped pumping except for a small dribble of water....Read more
60 customers mention durability, 13 positive, 47 negative
Customers report multiple durability issues with the pump, including motors blowing within a year, fuses blowing, and the pump breaking after two months of use.
Crapped out. Wiring connections came loose. Worked awesome until then. Vague warranty process.Read more
Rubber Mounting holes broke right away. The pump was mounted in my bilge and the mounts could not withstand some chop from the bay.Read more
The pump only lasted 8 months. The motor froze up. Tried to contact for warranty with no luck....Read more
...It appears to be quite substantial and rugged. I have not installed on my boat as yet . The price was very good and delivery was super fast.Read more
44 customers mention pressure switch, 10 positive, 34 negative
Customers report issues with the pump's pressure switch, noting that it frequently dies and fails to shut off properly.
Pressure cutoff switch quit after 2 weeks. Very disappointed.Read more
The pressure switch went out less than one year.Asked for replacement pump.They said we can send a switch but you must install....Read more
...Like the pressure switch went badRead more
Defective pressure switch, has pressure, will not shut off, NFGRead more
HUGE upgrade!
5 out of 5 stars
HUGE upgrade!
got this to replace the 11 year old shurflo 3.5 gpm pump that i am pretty sure came with my trailer. thing was having all sorts of issues and it had a constant problem of "surging" pressure whenever you turned something on because of the pump cycling on and off. taking showers SUCKED assuming you could even get a whole shower in before the check valve decided to lock up and have 0 pressure. overall just a bad time with the ol shurflo enter this bad boi. coupled with a seaflo accumulator tank and my water pressure is DEAD NUTS ON 60 PSI at all times. i even put a gauge on there to be sure. all my faucets have excellent flow and pressure on the pump like it was hooked to city water! showers are PERFECT with no weird "surging" from the pump cycling. it's also much quieter which is wild considering this pump is bigger! since i wasn't sure if it had its own check valve, i installed one in-line on the vacuum side. if you do install a check valve, THAT'S WHERE IT GOES. trust me. i put it between the accumulator and pump and the pump didn't want to fully shut off, and the pressure was a whole 5 psi higher than it should be. swapped it around and all is good all and all, this is it y'all. get this one!
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Top reviews from the United States

  • 5 out of 5 stars
    Quite and powerful!
    Reviewed in the United States on May 23, 2026
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    I’m a full time livaboard on a 44 foot trawler. My previous on demand water pump died because of the pressure switch. I had it about two years. This time I was willing to pay more for hopefully a better pump. Time will tell. I’ve only had it a couple weeks. It has a 4 year warranty which I registered on line. (Very simple) installation was very straightforward. No surprises. The two things I liked immediately was, just how quiet it was. The old one you could hear throughout the boat. This one can barely hear in the bathroom on the other side of the bulkhead it’s mounted on. The second one is the pressure. After living most of my life on a boat I just got use to slightly low water pressure. This one has house water pressure or slightly more, even though it’s rated the same as my old one. Reliability I don’t know yet. If I have problems I’ll update it.

    One person found this helpful
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  • 5 out of 5 stars
    Delivers More Lift Than 9-Feet
    Reviewed in the United States on August 12, 2025
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    I have this pump mounted to a wood frame to pump water from my home's well to irrigate my potatoes and black raspberries. When I can babysit it, I connect it to a 12-volt automotive battery. This battery is recharged by a 100W Renogy solar panel, controlled by a small charge controller. The specs of this pump said the maximum head lift is 9-feet, so I cut the siphon (inlet) tubing 9-feet long. The water level in my well is about 9-feet below ground, so it was barely long enough to reach. I added another 5-feet of tube and found that it pumps water and mostly maintains a prime, although sometimes it'll lose the prime and stop pumping. So far, I'm pleased with its performance.

    2 people found this helpful
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  • 5 out of 5 stars
    heavy duty
    Reviewed in the United States on November 19, 2024
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    bought this to replace shurflo 3.0 gpm pumpmin my rv. had room to install but itnis so much more powerful that i needed to return it because the draw down on my house batteries was too much once solar was no longer charging. once the batts fell to 12.5v or less, the pump would not automatically turn off even when water valves were closed. it mentions needing full power when running but normally12.5 can sufficiently run pumps we have been using for decades for a few minutes without problrms. however, this one can draw 15amps max, almost twice what shurflo draws. so without shore power or genset running when off grid after sundown, it could run a battery bank down quite a bit if showering, even short ones, when you have no active charging going on. if hooked up all the time and charger is on, it would be a quality addition to the rv. however, unless you have a large battery bank when offgrid, which we do often in summer, it is overkill.

    4 people found this helpful
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  • 4 out of 5 stars
    12 volt pump
    Reviewed in the United States on March 30, 2026
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    Works great on our sprayer just hoping to get a little more life out of this one last one only lasted 2 years

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  • 1 out of 5 stars
    Seaflo fresh water pump
    Reviewed in the United States on June 1, 2026
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    It loud, it cycles rapidly very disappointed in

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  • 5 out of 5 stars
    Works as intented
    Reviewed in the United States on June 2, 2026
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    Works amazing, works better than the stock seaflo 33 series 12v pump that was in my rv

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  • 5 out of 5 stars
    HUGE upgrade!
    Reviewed in the United States on February 23, 2025
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    got this to replace the 11 year old shurflo 3.5 gpm pump that i am pretty sure came with my trailer. thing was having all sorts of issues and it had a constant problem of "surging" pressure whenever you turned something on because of the pump cycling on and off. taking showers SUCKED assuming you could even get a whole shower in before the check valve decided to lock up and have 0 pressure. overall just a bad time with the ol shurflo

    enter this bad boi. coupled with a seaflo accumulator tank and my water pressure is DEAD NUTS ON 60 PSI at all times. i even put a gauge on there to be sure. all my faucets have excellent flow and pressure on the pump like it was hooked to city water! showers are PERFECT with no weird "surging" from the pump cycling. it's also much quieter which is wild considering this pump is bigger!

    since i wasn't sure if it had its own check valve, i installed one in-line on the vacuum side. if you do install a check valve, THAT'S WHERE IT GOES. trust me. i put it between the accumulator and pump and the pump didn't want to fully shut off, and the pressure was a whole 5 psi higher than it should be. swapped it around and all is good

    all and all, this is it y'all. get this one!

    HUGE upgrade!
    HUGE upgrade!
    5 out of 5 stars
    HUGE upgrade!
    Reviewed in the United States on February 23, 2025

    got this to replace the 11 year old shurflo 3.5 gpm pump that i am pretty sure came with my trailer. thing was having all sorts of issues and it had a constant problem of "surging" pressure whenever you turned something on because of the pump cycling on and off. taking showers SUCKED assuming you could even get a whole shower in before the check valve decided to lock up and have 0 pressure. overall just a bad time with the ol shurflo

    enter this bad boi. coupled with a seaflo accumulator tank and my water pressure is DEAD NUTS ON 60 PSI at all times. i even put a gauge on there to be sure. all my faucets have excellent flow and pressure on the pump like it was hooked to city water! showers are PERFECT with no weird "surging" from the pump cycling. it's also much quieter which is wild considering this pump is bigger!

    since i wasn't sure if it had its own check valve, i installed one in-line on the vacuum side. if you do install a check valve, THAT'S WHERE IT GOES. trust me. i put it between the accumulator and pump and the pump didn't want to fully shut off, and the pressure was a whole 5 psi higher than it should be. swapped it around and all is good

    all and all, this is it y'all. get this one!

    3 people found this helpful
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  • 5 out of 5 stars
    Nice flow and pressure
    Reviewed in the United States on June 4, 2026
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    This worked perfect with 1/2” feed line and micro sprinklers tapped in to the hose and prefect pressure like garden hose at your house. Have about 15 micro sprinklers tapped into it

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Top reviews from other countries

  • 5 out of 5 stars
    Worth every penny!
    Reviewed in Singapore on December 24, 2020
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    This is a powerful little pump that works efficiently and quietly. Pressure is great!

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  • 5 out of 5 stars
    Very happy with the pump after 3 months
    Reviewed in Australia on September 8, 2025
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    I've had this pump for about 3 months and it works well and is a lot quiter than the last one I had.

    I'd definitely buy this again.

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  • 5 out of 5 stars
    Very impressed
    Reviewed in Australia on April 27, 2021
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    This pump has enough pressure to use a normal garden hose and project water up to the roof of a second story house very impressed does exactly what I wanted to do

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  • 5 out of 5 stars
    Awesome
    Reviewed in Australia on February 20, 2023
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    This is a great pump and works as advertised. I highly recommend this pump.

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  • 5 out of 5 stars
    Very reliable and pushes water a long way
    Reviewed in Canada on August 17, 2023
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    I don't often review a product but after having this pump for 2 years I am happy to report it surpassed my expectations. I installed the pump at lakeside with a 150 watt solar panel charging 2 - 400 amp hr batteries and it pushes water vertically about 30' with a 200' run to the cottage. I'd say my flow rate is about 2 - 2.5 gpm at this distance with decent pressure. I used 3/4" PEX to the cottage then 1/2" branch lines. No problem operating our on demand hot water heater. So then I plumbed another line to an outbuilding another 75' further from the lake and still have adequate pressure and volume.

    This pump has worked flawlessly for 2 years now. I'd definitely buy again.

    I wanted to submit this so that anyone wanting to add water to their off grid cottage can feel confident that this pump will give them the water supply they will need.

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Sponsored

Product Summary: SEAFLO 55 Series 12V RV Water Pump 5.5 GPM 60 PSI Diaphragm Pump Heavy Duty Pressure Switch Built In Bypass Self Priming Quiet High Flow RV Marine Off Grid Freshwater System 4-Year Warranty

From SEAFLO

4.2 out of 5 stars, 1,852 ratings

Customer reviews

500+ bought in past month

About this Item

  • [ SPECIFICATIONS ]: Model: SFDP1-055-060-55 | Voltage: 12V DC | Flow Rate: 5.5 GPM (20.8 LPM) | Shut Off Pressure: 60 PSI (4.2 BAR) | Suction Lift: 9 ft (2.7 m) | Max Draw: 17A | Ports: 1/2 in MNPT Threaded | Materials: EPDM valves Santoprene diaphragm | Max Temp: 140°F (60°C) | Intermittent Duty | Warranty: 4 Years
  • [ 4 YEAR WARRANTY ]: Backed by SEAFLO’s 4 Year Limited Warranty, this pump is built for long term reliability and peace of mind in demanding freshwater systems. Designed for daily use in RVs, boats, cabins, and off grid installations, it provides dependable performance where consistent water delivery is essential for comfort and functionality.
  • [BUILT TO NSF UL Standards FOR RV POTABLE WATER ]: Built to NSF/ANSI/CAN 61 & 372 (Potable Water Safety), NSF 24 (RV Plumbing), and UL 778 (Motor-Operated Water Pumps) Safe for drinking water and compliant with RV and marine plumbing standards across North America.
  • [ HIGH FLOW 5 CHAMBER DESIGN ]: Advanced five chamber diaphragm construction delivers strong output up to 5.5 GPM while reducing rapid cycling compared to smaller pumps. This allows simultaneous use of multiple fixtures such as showers, faucets, and washdown hoses while maintaining stable pressure and smoother water delivery.
  • [ HEAVY DUTY PRESSURE SWITCH WITH BYPASS ]: Integrated smart pressure switch automatically starts and stops the pump based on water demand, while the built in bypass stabilizes pressure and reduces frequent on off cycling. This improves system efficiency, extends service life, and delivers more consistent performance across varying flow conditions.
  • [ SELF PRIMING RUN DRY CAPABLE ]: Capable of self priming up to 9 ft, the pump can be mounted above the water source without losing performance. Run dry capability protects internal components during temporary water shortages or tank depletion, making it highly reliable for mobile systems and remote installations.
  • [ QUIET LOW VIBRATION OPERATION ]: A semi rigid rubber mounting base isolates vibration and reduces operating noise, making the pump suitable for enclosed compartments such as RV cabinets or boat lockers. This quieter performance improves onboard comfort while still delivering the high flow output required for everyday use.
  • [ DURABLE MATERIALS FOR HARSH USE ]: Constructed with corrosion resistant components including EPDM valves and a Santoprene diaphragm, the pump withstands demanding freshwater and saltwater environments. These materials provide strong sealing performance, abrasion resistance, and long service life in marine and mobile water systems.
  • [ INCLUDES INSTALLATION ESSENTIALS ]: Supplied with two 1/2 inch barbed hose adaptors, a 50 mesh inlet strainer, and installation instructions to simplify setup. Combined with standard threaded ports and pre wired leads, the pump is ready for straightforward integration into compatible RV, marine, or off grid plumbing systems.

Product Description

The SEAFLO 55 Series 12V Water Pump is engineered for RV owners, boaters, and off-grid users who need strong, dependable water delivery across multiple fixtures. Producing up to 5.5 gallons per minute (GPM) with a shut-off pressure of 60 PSI, this high-performance diaphragm pump provides steady flow for showers, sinks, washdowns, and complete freshwater systems in mobile or remote environments. Its advanced 5-chamber design reduces rapid cycling while maintaining smooth, consistent pressure similar to a residential water system. Built for durability and stable performance, the pump features a heavy duty smart pressure switch with integrated bypass, allowing automatic on-demand operation while minimizing wear on internal components. Premium Santoprene diaphragm and EPDM valves deliver excellent sealing performance and resistance to heat, abrasion, and corrosion in both freshwater and saltwater conditions. Self-priming capability up to 9 feet enables flexible mounting above the water source, making it ideal for challenging installations. Comfort and reliability are further enhanced by the pump’s quiet low-vibration operation, supported by an anti-vibration rubber mounting base that reduces noise transfer into surrounding structures. Installation is straightforward thanks to standard threaded ports and included fittings and strainer. Whether powering an RV plumbing system, marine freshwater supply, or remote cabin setup, the 55 Series delivers dependable daily performance backed by SEAFLO’s trusted engineering and a 4 Year Warranty.

Options Available

Style

  • 1.2 GPM - 35 PSI
  • 5.5 GPM - 60 PSI
  • 7.0 GPM - 60 PSI
  • 45 PSI- 3.0 GPM
Browse all available options

Important Information

Bulb Voltage

12 volts_of_direct_current

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