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Seaflo 12V DC 1.2 GPM 35 PSI 21-Series Diaphragm Water Pressure Pump for Caravan/RV/Boat/Marine

4.4 4.4 out of 5 stars 1,350 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Boat Water Pressure Pumps by SEAFLO

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About this item

  • The 21-Series Pumps are compact and designed for a wide range of applications including liquid transfer, spraying, circulation, filtration and dispensing
  • The 21-series of diaphragm pumps are self-priming and can be run dry without harm. It provides up to 1.2 gallons per minute
  • Built-in 35 PSI pressure switch for automatic stop/start
  • Self-priming allows it to be mounted above tank; able to run dry
  • 1.2 gallons per minute (4.2 liters per minute) Built-in thermal protector; 3/8-inch hose barb ports

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Top Brand: SEAFLO

Highly Rated
4.4/5 star rating from 10K+ customer ratings
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10K+ orders for this brand in past 3 months
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Product Description

NEW 12V Self-Priming Water Pressure Pump 1.2 Gallons/Min (4.3 LPM) 35 PSI Product Details: This product is 100% brand new and comes in original color packing Powerful automatic pressure pump 1.2 Gallons Per Minute (4.3 LPM) capacity flow, and 35 PSI pressure Extremely efficient, very low current draw and offer high capacity output Self priming Smooth, silent operation Can run dry without damage Thermal overload and ignition protection Easy connecting system Low power draw Soft rubber mounts Professional grade pump - Ideal for marine, caravans/RV, and agriculture applications Built-in pressure switch, to automatically turn on and off as you turn your tap or nozzle on and off Beware of inferior non-genuine products on the market that claim to be just as good Specifications Voltage: 12V DC Flow capacity: 1.2 Gallons per minute (4.2 Litres per minute) Water pressure: 35 PSI Hose Outlets: Fixed 10mm (3/8") diam. hose tails Twin core wire Current Draw: 1.7 Amp (max. 2.7 Amp) Dimensions: Length 170mm x Width 100mm x Height 67mm Approvals: CE Applications For marine, RV, agriculture and recreational applications Suits all size boats, caravans, mobile homes, etc. For sinks, taps, showers, or toilets Other applications where you have to transfer water

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Seaflo 12V DC 1.2 GPM 35 PSI 21-Series Diaphragm Water Pressure Pump for Caravan/RV/Boat/Marine


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
1,350 global ratings

Customers say

Customers like the pressure, performance, and ease of installation of the water pump. They mention that it has excellent pressure, works well as a sprayer pump, and is very robust. They appreciate the value, and pump. That said, opinions are mixed on flow rate, noise, and size.

AI-generated from the text of customer reviews

203 customers mention182 positive21 negative

Customers like the performance of the water pump. For example they mention it works well as a sprayer pump, holds up to the elements, and is very robust.

"...So, operator error. Not the pump. Pump works well...." Read more

"Works GREAT, a bit loud for our camper tho. My only complaint." Read more

"The pump is solid and has excellent pressure. It's holding up to the elements so far. The price was less than $24." Read more

"I love this pump, it works very well for the sink in my van without an accumulator tank. It allows for a very slow flow if desired to save water...." Read more

74 customers mention59 positive15 negative

Customers like the water pump. They say it's perfect for pumping water out of a boat or RV. It's quiet, small, and nifty little pump that recovers nicely from loss of prime. It has a very good output, and is powerful.

"These Seaflow pumps are great pumps for potable water in campers, RVs, Boats, and even off grid cabins...." Read more

"Good pump" Read more

"...The pump recovers nicely from loss of prime...." Read more

"...because my first one finally died after 16 months of use! Great little pump, I had better results of water with 3/8" tubing...." Read more

61 customers mention53 positive8 negative

Customers like the value of the water pump. They mention it has excellent value and good quality for the price.

"Cheap but does the trick...." Read more

"...Good news is that it is inexpensive and easy to replace." Read more

"...provided required flow with now hassle or modification and at a discount price with fast shipping." Read more

"It is good quality for the price I cannot speak to longevity because I've just begun using it...." Read more

42 customers mention33 positive9 negative

Customers like the pressure of the water pump. For example, they say it has excellent pressure, it's light on the pressure, and it turns off once it builds up pressure. They also appreciate the built-in pressure switch, which works well and doesn't burn out if it runs dry.

"The pump is solid and has excellent pressure. It's holding up to the elements so far. The price was less than $24." Read more

"...They have pressure switches built in, which is great if you forget to turn it off.They pump well but are still easy on the battery...." Read more

"...You dont need high pressure fittings, you can use any old hose and regular pipe clamps...." Read more

"...Pressure is satisfactory for truck camper activities- if you have a full travel trailer or RV with a luxury shower, you may prefer a larger pump." Read more

39 customers mention36 positive3 negative

Customers find the installation of the water pump to be simple. They mention that the power wires are pretty self-explanatory, and the inlet/outlet ports are easy to hook up. The pump is up and running in less than 20 minutes, and its 8" long red and black wires make connection easy.

"...Power wires are pretty self-explanatory (red is +, black is -), but the inlet/outlet ports weren't even labeled...." Read more

"It was easy to install . It didn't come with an electrical connector, just bare ends on the wires. Flow was good but the pump was a little noisy ." Read more

"...And are easy to install with the pressure switch already wired, so it is the simple positive ani negative wires only." Read more

"Easy to install works as advertised" Read more

75 customers mention32 positive43 negative

Customers are mixed about the noise of the water pump. Some mention that it runs well and is quieter than the Shurflo, while others say that it's a little loud.

"...The pump is a little bit noisy by itself, but once the dinette cushions are back on and particularly if there are some additional items in the space..." Read more

"I bought a similar pump that was a dud. This pump is way more quiet and has a 4 year warranty." Read more

"Works GREAT, a bit loud for our camper tho. My only complaint." Read more

"...It allows for a very slow flow if desired to save water. Not too loud if you mount it loose..." Read more

30 customers mention17 positive13 negative

Customers are mixed about the flow rate of the water pump. Some mention that it provides a weak stream for watering or sprinklers, while others say that it is disappointing and stopped flowing at full capacity.

"...Flow was good but the pump was a little noisy ." Read more

"After 1 month of continous use it stopped pulling in saltwater. So I thought it was the pump. I had checked the filter and 3/8" houses looked good...." Read more

"...They pump well but are still easy on the battery. and are self-priming, and per the manual will not be harmed if ran dry...." Read more

"...restarts it would pump again for a gallon or two until it stopped transporting water again...." Read more

29 customers mention20 positive9 negative

Customers have mixed opinions about the size of the water pump. Some mention that it fits perfectly into the space of the old one and works fine, while others say that it's too small. The inlet and outlet is way too small for the use, and did not fit water cooler.

"...This one is perfect for this size camper." Read more

"...a high (or even normal) volume, get a bigger pump, this one is perfect for small, light applications." Read more

"This unit is TINY!!! I used it to replace a MUCH larger pump that had failed on my boat...." Read more

"Perfect fit" Read more

Pulling salt water from the Gulf of Mexico
5 Stars
Pulling salt water from the Gulf of Mexico
After 1 month of continous use it stopped pulling in saltwater. So I thought it was the pump. I had checked the filter and 3/8" houses looked good. There was mold accumulated in my bait bucket, so i figured sea mold was inside the pump as well. So reluctantly I opened up the actual pump, unscrewed the 5 screws and a bunch of little parts and springs popped out. We'll the darned thing was clean🤣. Come to find out, seaweed had entered the long house going into the canal. So, operator error. Not the pump. Pump works well.
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Top reviews from the United States

Reviewed in the United States on December 16, 2023
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5.0 out of 5 stars Pulling salt water from the Gulf of Mexico
Reviewed in the United States on December 16, 2023
After 1 month of continous use it stopped pulling in saltwater. So I thought it was the pump. I had checked the filter and 3/8" houses looked good. There was mold accumulated in my bait bucket, so i figured sea mold was inside the pump as well. So reluctantly I opened up the actual pump, unscrewed the 5 screws and a bunch of little parts and springs popped out. We'll the darned thing was clean🤣. Come to find out, seaweed had entered the long house going into the canal. So, operator error. Not the pump. Pump works well.
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Reviewed in the United States on June 9, 2014
6 people found this helpful
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Reviewed in the United States on August 4, 2023
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Reviewed in the United States on December 20, 2023
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Reviewed in the United States on February 16, 2024
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Reviewed in the United States on August 1, 2023
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Reviewed in the United States on September 1, 2023
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Top reviews from other countries

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elvis
4.0 out of 5 stars Good
Reviewed in Canada on February 12, 2024
Amazon Customer
5.0 out of 5 stars tres bon produit
Reviewed in Canada on March 5, 2024
Marc
4.0 out of 5 stars ok for backward after too much rain
Reviewed in Canada on March 28, 2023
Edward Bate
4.0 out of 5 stars Surprised by its performance
Reviewed in Canada on July 4, 2023
Jet1
5.0 out of 5 stars Pump works fine
Reviewed in Canada on October 25, 2023