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SEAFLO 42-Series Water Pressure Diaphragm Pump w/Variable Flow For Reduced Cycling - 12V, 3.0GPM, 55PSI

4.4 out of 5 stars 1,089 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Boat Water Pressure Pumps by SEAFLO

Price: $69.99 & FREE Returns
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Brand SEAFLO
Color Orange
Material EPDM, Stainless Steel, Polypropylene, Santropene
Style Diaphragm
Product Dimensions 7.97 x 4.92 x 4.37 inches; 4 Pounds
Power Source Battery Powered
Maximum Flow Rate 3 Gallons Per Minute

About this item

    This fits your .
  • Make sure this fits by entering your model number.
  • UL 778 & CSA 22.2 Certified
  • 12 Volt, 3.0 GPM, 55 PSI Positive Displacement Pump
  • Variable Flow With Bypass Technology For Reduced Cycling!
  • Self-Priming And Capable Of Run Dry Operation
  • 4 Year Warranty comes standard on all SEAFLO products
See more product details

Frequently bought together

  • SEAFLO 42-Series Water Pressure Diaphragm Pump w/Variable Flow For Reduced Cycling - 12V, 3.0GPM, 55PSI
  • +
  • SHURFLO (255-313) 1/2" Twist-On Pipe Strainer
  • +
  • SEAFLO Pre-Pressurized Accumulator Tank
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Customer Rating 4.4 out of 5 stars (1089) 4.4 out of 5 stars (149) 4.5 out of 5 stars (354) 4.6 out of 5 stars (178) 4.5 out of 5 stars (234) 4.4 out of 5 stars (974)
Price $69.99 $74.99 $99.99 $69.98 $69.99 $31.99
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Sold By MarineNow dchousing MarineNow Valueinmotion GK Wholesale GK Wholesale

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Product description

SEAFLO 42-Series Water Pressure Diaphragm Pump w/ Internal Bypass - 12V, 3.0 GPM, 55 PSI

Meet our newest addition to our diaphragm pumps: the 42 series. UL 778 & CSA 22.2 Certified. It retains the raw power and pressure of its predecessors, but also can adapt to situations where huge flow is not needed. Compact but capable, it is a great fit for tight spaces. It may also be configured with different inlet types, each with their own unique fittings to be sure that it fits any application you can require. It also features an internal bypass to reduce pump cycling. No accumulator tank needed! Our 42-Series will perform optimally under both high flow and low flow. It also features self-priming and priming up to 6 vertical feet while operating quietly during any application. This pump is capable of running dry and even contains a built-in check valve. Lastly, as will all SEAFLO products, it comes with a 4-Year Limited Warranty!

**PLEASE NOTE: On delivery, this pump may rarely have small amounts of residual water left in it. This is due to the rigorous testing the pump goes through for quality assurance and to comply with UL and CSA standards. This is not an indication of a used pump**

Specs: 
-Max Flow: 3.0 GPM
-Electrical: 12V DC
-Inlet: 1/2" -14 MNPT / Outlet: 1/2" -14 MNPT
-Weight: 4.0 lbs (2.5 kg)
-Pressure: 55 PSI
-Max Amperage: 7.5
-4 Year Warranty

Package Includes:

- 1 x SFDP1-030-055-42 Model Water Pressure Diaphragm Pump
- 1 x Warranty Information
- 1 x Installation Instructions
- 2 x 1/2" Barbed Hose Adaptors
- 1 x 50 Mesh Strainer/Filter


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
1,089 global ratings
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Top reviews from the United States

Reviewed in the United States on August 6, 2020
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53 people found this helpful
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Reviewed in the United States on January 11, 2018
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5.0 out of 5 stars The Amazon web site clearly states that the pump is ...
By Leonard Taylor on January 11, 2018
The Amazon web site clearly states that the pump is warranted for 4 years. Paper work inside with the pump says warranty is for 2 years. What is the correct warranty period.
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57 people found this helpful
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Reviewed in the United States on April 18, 2018
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5.0 out of 5 stars Five stars
By Adriano on April 18, 2018
Replaced my Shurflo this season and THIS PUMP IS AMAZING! At first i was skeptical because the cost was so much lower than what ive seen from competitors. Its super quiet and at low flow the pump doesnt cycle which is a nice bonus. Sick of pumps breaking so I will definitely be looking to Seaflo again the next time my bilge breaks
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39 people found this helpful
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Reviewed in the United States on June 2, 2018
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30 people found this helpful
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Reviewed in the United States on August 1, 2018
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4.0 out of 5 stars Decent pump for the money
By Roy on August 1, 2018
Replaced a 45 PSI, 5gpm pump with this pump. Added the accumulator tank to offset the 2 gpm reduction in flow capacity. Accumulator works like a mini pressure tank by having a captive air bladder which compresses under water pressure from the pump and gives you some added volume of water flow before the pump drops to its low limit and turns on. Less pump cycling, less power consumption, more volume at the higher pressures. Well, it works ok but I was spoiled by the old failed higher volume pump. Ran for 1 minute into a bucket with no nozzle and it moved 2 1/2 gallons of water. Not quite the 3 gpm they specified. 3', 3/4" diameter inlet hose and 2',3/4" diameter outlet hose to a10' long 1/2" i.d. coil hose. 18" draw to the pump from the inlet. Washdown gets it's use washing catfish slime off hands and boat. Lots of occasional use. Not as good a setup as the lower pressure, higher volume pump which it replaced. Picture is what was installed. Sorry, not diving the bilge for an install picture. It's in with 4 stainless screws which do not come with the pump. While your picking up the screws and clamps at Lowes, get a few waterproof elctrical crimps in their pump aisle. They shrink with a heat gun or lighter and give you a water tivht connection that will not corrode. Had to adapt inlet and outlet hoses in boat from 3/4" down to 1/2". That was preexisting plumbing and just meant a trip to Lowes for reducer fittings and stainless clamps. Fittings that came with pump are 1/2" and work fine. This absolutely is not up to washing down you deck. As soon as you bleed off the higher pressure and your into the flow the pump can supply you get a flow on par with what this 58 year old fart can do on his own... 4 stars for marginal flow which is 1/2 5gpm under rating. Probably going to buy a higher capacity pump and move this one to the freshwater system in the boat to replace a 1 gpm lame excuse for a pump there. My advice is, don't cheap out and get a low 5gpm rated pump. I think the SeaFlow is a good product for the money and will likely buy another one, just higher 5gpm rating.
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11 people found this helpful
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Reviewed in the United States on July 26, 2018
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19 people found this helpful
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Reviewed in the United States on July 5, 2018
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16 people found this helpful
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Top reviews from other countries

The Outdoorsmen
5.0 out of 5 stars Great for Fishing Camp and bush use.
Reviewed in Canada on August 1, 2018
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6 people found this helpful
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Tarzan
1.0 out of 5 stars There is NO WARRANTY.
Reviewed in Canada on August 14, 2019
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3 people found this helpful
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Richard Garneau
1.0 out of 5 stars Les pompes shurflo sont irremplaçables
Reviewed in Canada on October 27, 2019
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2 people found this helpful
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Robert D.
5.0 out of 5 stars Elle ne fait pas de bruit
Reviewed in Canada on June 16, 2019
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2 people found this helpful
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JASON
5.0 out of 5 stars So Happy!
Reviewed in Canada on June 12, 2018
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5 people found this helpful
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