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SEAFLO 33-Series Water Pump and Accumulator Tank System - 12V DC, 3.0 GPM, 45 PSI, 0.2 Gallon Tank - Reduces Cycling For Marine, Boat, RV, Off-Grid Applications- 4-Year Warranty! CE & RoHS Certified

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$109.99

$ 45 .99 $45.99

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About this item

  • [ SPECIFICATIONS ] Model: SFWSK1-030-045-002 | Voltage: 12V DC | Open Flow: 3.0 GPM (11.3 LPM) | Tank Volume: 0.2 Gallon (0.75 L) | Pressure Off: 45 PSI (3.1 BAR) | Pressure On: 35 PSI (2.4 BAR) | Priming Capability: Self-priming up to 6 feet (1.8 m) suction lift | Max Draw: 11.0A | Ports: 1/2" MNPT | Material: EPDM valves / Santoprene diaphragm
  • [ REDUCES CYCLING WITH ACCUMULATOR TANK ] The 0.2-gallon accumulator tank minimizes pump cycling, ensuring steady water pressure, quieter operation, and longer pump life by reducing wear and tear on internal components.
  • [ POWERFUL PERFORMANCE FOR MULTIPLE FIXTURES ] With a 3.0 GPM flow rate and 45 PSI shut-off pressure, this pump is capable of simultaneously supplying water to up to three fixtures, making it perfect for boats, RVs, cabins, and tiny homes.
  • [ DURABLE CONSTRUCTION FOR LONGEVITY ] Built with EPDM valves and a Santoprene diaphragm, this system withstands harsh conditions, providing corrosion resistance and consistent performance in marine, RV, and off-grid environments.
  • [ EASY INSTALLATION & VERSATILE MOUNTING ] The system comes pre-assembled and is ready for installation, with horizontal or vertical mounting options for effortless setup in new or existing water systems.
  • [ ULTRA-QUIET OPERATION ] Engineered for silent performance, the heavy-duty corrosion-resistant motor and precision design reduce noise, creating a smooth and quiet water pressure experience.
  • [ SAFE FOR DRINKING WATER APPLICATIONS ] Constructed with materials that meet potable water safety standards, this system is ideal for drinking water systems in RVs, boats, tiny homes, and off-grid setups.



Product Description

Unique After-Sales Laser Code on Pump Body:

33-Series Technical Specifications

Model Number SFWSK1-030-045-002
Voltage 12V
Open Flow (GPM/LPM) 3.0 / 11.3
Max Draw 8.0A
Shut-off Pressure (PSI/BAR) 45 / 3.1
Priming Capabilities 6 feet (1.8 m) suction lift
Max Recommended Temperature: 140° F (60° C) Max
Material: EPDM (Valves) / Santoprene (Diaphragm)
Ports: 1/2"-14 MNPT
Noise Level: 60DB
Fixtures Quantity 3-4
Leads 16 AWG, 4.5″ long with 2-Pin connector/Leads
Duty Cycle Intermittent

SEAFLO 33-Series Water Pump Accumulator System Pump Diagram

60DB
33-Series Included Fittings

Michael
Reviewed in the United States on February 17, 2025
I so what this to work for me. The pump is great and set up easy but the pressure tank is a joke.Does nothing for adding pressure or saving energy.The pump is on constantly when the water is running. I definitely would not buy this product again. Save your money and only buy the pump. A pressure tank maybe a separate thing.I am still working on the aspect of my system.
Barry M.
Reviewed in Canada on January 7, 2025
Box was pretty beat up and didn’t try the item yet but seems fine .
Skip
Reviewed in the United States on December 13, 2024
Bought this setup to replace the Shurflo RV pump that came factory in my 3 year old trailer, absolutely the best decision I've ever made for this trailer. Super quiet, almost too quiet, kinda scary. I've been trying to isolate where all the pump noise was coming from, the PEX vibrating.. nope, it was the pump. I will never buy another Shurflo pump again. And the pressure tank is nice, no fluctuations in water flow now either. A+++
Lowell H.
Reviewed in the United States on July 8, 2023
Easy to install thanks to the preconfigured mounting plate and the integrated wire terminals. It’s beginner friendly and well designed. It’s QUIET, barely noticeable over conversation volume. No leaks, no malfunctions. Have been using it every single day, cooking and cleaning, 6 months of living aboard with two adults. Products like this are such a joy to have on the boat.
Fixit Jake
Reviewed in the United States on May 6, 2023
Overall I like this upgrade. The only issue I had with mine is that the pressure switch seemed to be set too high. When I first installed it, I switched it on started testing things. Everything was going good, so I left the pump on to see if I had any leaks for a while. I came back about an hour later and I couldn't touch the pump it was so hot. It also wouldn't run at that point when I turned on a faucet. It turned out that the pressure switch was set too high, and even 12 volts from the converter in my RV couldn't supply enough juice over 12a WG wire to satisfy that switch. Unfortunately I had already mounted and completely connected the pump, and I had situated it so that the pressure switch adjustment screw was facing a wall. After some adjustment, the unit works fine, and I found out that it wasn't running because of a thermal cut off. I just let it cool down and everything is good.The install was quick and easy. The pump on the board is much larger than just the pump that came in my rv, but I locked out that it fit perfectly on the floor inside the cabinet that the original pump was mounted in. Thanks to the additional connectors that were all included, I was able to shorten and properly connect the inlet and outlet without any modifications to the RV.I line the inside of the cabinet at this pump is mounted in with butyl rubber. Together with the rubber feet on the mounting platform, and the fact that it's just a quieter pump to begin with, the water pump has gone from something that will wake you up in the middle of the night to something that you strain to hear. Really nice upgrade
Ryan
Reviewed in the United States on March 4, 2023
**TLDR five stars and a super straightforward and worthwhile upgrade in the RV! **Water flow is smooth and plentiful (like a house). The pump is so quiet I have to check if I actually turned it on! The flow rate seems to be really good, we have a standard low flow shower head in the RV and it acts just like the shower at the house. It’s on a rubber isolated backing plate and the pump and accumulator are also isolated from the backing plate via rubber feet. It’s got a neat set of power and ground leads in the top corner for quick access and connections. It does not show it in the pin it’s but comes with a strainer for the inlet side and two right angle hose adapters. It took me longer to get the access panel out of the way and find the correct bit to undo the RV screws then swapping out the pump. Would highly recommend this to anyone that’s tired of the shuttering water and loud noise a normal RV water pump is.
cbjones98
Reviewed in the United States on April 15, 2023
We have been camping for years with commercially built RVs. We have now joined the DIY custom camper tribe and installed this water pump in our unit. It is under the kitchen sink, and it is so quiet you cannot hear it turn on and off. The pressure is constant, no pulsating, works as it should! Very impressed with this water pump! We will see how long it lasts but do recommend it for a quiet, consistent pressure pump.
Dick Approved
Reviewed in the United States on October 10, 2022
Seems to work good so far...Key thingsA) Holding pressure "Without check valve.B) flow is very goodC) variable speed motor speeds up and slows as needed.D) automatic shut off "no battery drain" meaning no on/off switch required.E) has a couple fittings "note" a pex fitting or two for Inlet and outlet would have been really nice but other then that 👍for the price.F) came assembled easy wall mount install with easy power connectors.Hopefully this helpsIf problems occur later I will be back
Becca
Reviewed in the United States on March 12, 2021
I love that I was able to just hook this up to those metal mesh under sink lines and then those lines up to my pex in my RV. This made for a super flexible fix because I had to put the pump in an awkward place.It is so quiet that I'm worried that if I ever spring a leak I won't hear the pump cycling on and off. With my last, very noisy pump, the whole RV would rumble a bit when the water was turned on. With this one in its new place, I have to really concentrate to hear it.I love that I can wrinse my dishes with just a trickle of water and not have a loud pump constantly trying to handle a tiny load. This thing saves me so much water with the accumulator. I wish it had a larger accumulator tank but I went with this one because I got an amazing deal on an open box, slightly damaged one.
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