SEAFLO 33 Series Water 110V AC Pressure Pump - 115V AC, 3.3 GPM, 45 PSI, Self Priming, Smart Pressure Switch, for RV/Caravan/Marine/Industrial Use-NSF, CE & Rohs Certified, UL Listed, 4-Year Warranty
Condition: New
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FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Wednesday, Jan 7
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Features
- [ SPECIFICATIONS ]: Model: SFDPA1-033-045-33 | Voltage: 115V | Flow Rate: 3.3 GPM (12.5 LPM) | Shut-Off Pressure: 45 PSI (3.1 BAR) | Max Draw: 1.0A | Self-Priming Lift: 6 ft | Ports: 1/2"-14 MNPT | Max Temperature: 140F (60C) | Diaphragm: Santoprene | Valves: EPDM | Certifications: NSF/ANSI/CAN 61 & 372, NSF 24, UL 778, CSA C22.2 No. 108 | 4-Year Warranty
- [ INCLUDED COMPONENTS ]: Includes the SEAFLO 33-Series Pump, 50 Mesh Inlet Strainer, (2) 1/2" Barbed Hose Fittings, Wall Plug for 115V AC Power, Mounting Hardware, and User Manual for a complete plug-and-play setup. Perfect for DIY installs in RVs, marine applications, cabins, and household systems with minimal tools required.
- [ NSF UL CSA CERTIFIED FOR RV POTABLE WATER ]: Tested and certified to NSF/ANSI/CAN 61 & 372 (Potable Water Safety), NSF 24 (RV Plumbing), UL 778 (Motor-Operated Water Pumps), and CSA C22.2 No. 108 (Liquid Pumps). Safe for drinking water and compliant with RV and marine plumbing standards across North America.
- [ BACKED BY A 4-YEAR WARRANTY ]: Covered by SEAFLOs 4-Year Limited Warranty, this pump is built for long-term reliability and peace of mind. Designed for tough freshwater demands, its the perfect choice for RVs, boats, cabins, and off-grid living where consistent performance is critical.
- [ SELF-PRIMING AND RUN DRY CAPABLE ]: Self-primes up to 6 feet and can run dry without damage, giving you flexibility to install above water tanks and assurance during fluctuating tank levels. The run-dry safety prevents internal wear, making this pump ideal for rugged and remote system conditions.
- [ ULTRA QUIET WITH VIBRATION DAMPENING ]: Built with a rubber mounting base that isolates vibration and sound, this pump operates at a noise level similar to a standard fan. It's the best choice for low-noise zones like boat cabins, RV sleeping quarters, or off-grid homes where silence is golden.
- [ AUTOMATIC ADJUSTABLE PRESSURE SWITCH ]: Features a smart pressure switch that activates on water demand and stops when not needed. The adjustable PSI range (1760 PSI) lets you fine-tune performance for RVs, boats, and cabins. Enjoy hands-free operation for sinks, showers, toilets, and more.
- [ EASY WALL PLUG-IN FOR INSTANT USE ]: Pre-installed with a standard 115V wall plug, the SEAFLO 33-Series is easy to install with no wiring experience needed. Just plug it into a power outlet and connect the plumbing. Ideal for cabins, small homes, boats, or RVs without onboard 12V DC systems.
- [ #1 TRUSTED OEM PUMP BRAND BY THE RV INDUSTRY ]: SEAFLO is the top OEM pump brand in the U.S. RV and marine industry, used by manufacturers like Forest River, Thor, Winnebago, Grand Design, Brinkley RV, and Rev Group. The 33-Series is factory-installed and trusted for long-term performance.
Brand: SEAFLO
Color: Black, White
Material: Metal
Style: 3.3 GPM | 115V
Product Dimensions: 7.98"L x 5.11"W x 4.84"H
Power Source: ac
Item Weight: 4.2 Pounds
Maximum Flow Rate: 3.3 Gallons Per Minute
Maximum Lifting Height: 6 Feet
Voltage: 115 Volts
Brand: SEAFLO
Color: Black, White
Material: Metal
Style: 3.3 GPM | 115V
Product Dimensions: 7.98"L x 5.11"W x 4.84"H
Power Source: ac
Item Weight: 4.2 Pounds
Maximum Flow Rate: 3.3 Gallons Per Minute
Maximum Lifting Height: 6 Feet
Voltage: 115 Volts
Global Trade Identification Number: 11, 97
Manufacturer: SEAFLO
UPC: 793945652211 793945654697 647336948127
Part Number: SFDPA1-033-045-33
Item Weight: 4.2 pounds
Item model number: SFDPA1-033-045-33
Is Discontinued By Manufacturer: No
Size: 45 PSI
Amperage Capacity: 1.2 Amps
Item Package Quantity: 1
Special Features: Pressure switch
Included Components: Water Pressure Pump, intake strainer, fittings
Batteries Included?: No
Batteries Required?: No
Warranty Description: 4-Year Warranty
Date First Available: March 16, 2016
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jan 7
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I have used this pump for one season in a 30' X 100' greenhouse. It worked well with no issues. I ran ten 100' drip lines and it worked better when I watered half the greenhouse at a time.
Reviewed in the United States on December 11, 2025 by Bill H.
This pump is amazing. It is so quiet, pressure is amazing, very affordable, great fit, easy installation, and I love how it shuts off once I am done using my pressure washer
Reviewed in the United States on November 20, 2025 by Seth Richardson
I am not a plumber, but consider myself pretty handy. This is the 4th and final pump I got from Amazon as part of the camp shower build process (NOT defective, just trying different options). Here's what I learned, hopefully this will be helpful to others who are building outdoor camping showers. 1. The pumps plastic male fittings don't match box store brass fittings. They likely won't leak in plastic-on-plastic installations, but if you're screwing a metal female fitting onto the pump's plastic male fittings, they won't fit and will leak, even though technically both will say 1/2". I used flexible 1/2" hose and some hose clamps to make it work and avoid brass to plastic fittings. 2. This is an on-demand pump. You plug it in, and it will sense if water is being requested anywhere in your system and start pumping. Plan to build a system that's as leak-free as possible or this pump will continue to cycle periodically. I built a prototype garden hose system, which was full of leaks, and this pump kicked on for a second every 15-20 seconds because it assumed I was requesting water (even though it was just leaks). If your system is leak-free, the pump will stay off and silent until you open a valve somewhere in the system. 3. I bit the bullet and bought the $70 PEX crimp tool, which greatly simplified building my shower system. You'll need the crimp tool, some metal ring clamps, and a few baggies of elbows, tees, splicers, and shut-off valves. I was able to build my system with zero leaks. If you're doing this, get white PEX 1/2" line, it can be used for hot/cold/any water, in other words, blue cold line, red hot line, and white neutral line are all identical and differ only cosmetically. Don't think you need to buy red line to run hot water, there's nothing inherently special about color lines - they are all the same, and the only reason they are colored is to tell them apart. 4. The pump is not silent and will vibrate, which means you'll need to attach it to some kind of a solid substrate very firmly. Mine is outside and the noise is not a problem, but if you're doing an RV/interior build, you'll definitely hear it kick on and work, especially if it's bolted to a hollow surface, like under the stairs. Find a way to bolt it to a cinder block or an anvil to dampen the vibration. 5. My system includes a shower and a sink for washing hands (same line, split via a T connector), and this pump is pretty amazing at supplying strong pressure across 10-15 yards through 1/2" PEX lines. You'll be able to take on-demand showers with serious pressure. My wife is still freaking out about the awesomeness of taking pressurized showers in the middle of nowhere. Apparently, gravity/solar showers are huge bummers with ladies who wish to wash their hair, who knew. Overall, if you also grab some flexible reinforced tubing with clamps to bypass brass-to-plastic size fitting size issue, you'll be able to build whatever you need. Strongly recommend.
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Reviewed in the United States on July 17, 2019 by M. Y
Why did you pick this product vs others?: Good overall pump. I use it for my hydroponics system. It runs on a schedule. This pump is not intended to run continuously. It does run hot. It will be very hot to the touch after a couple hours of running. Good flow! We use the same pump in our RV and they work great in that application.
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Reviewed in the United States on June 22, 2025 by Charles Irwin
Bought as a backup the first one worked/working so good... nothing lasts forever especially after the abuse it goes threw....
Reviewed in the United States on November 25, 2025 by DUSTIN
It works just fine - with one exception - it's VERY LOUD! I even put some sound insulation around it. It comes on half a dozen times per day, for 16 seconds each time; so heat shouldn't be a problem. I'll keep trying to find a work around, but I may have to junk it, and take a chance on a different pump. UPDATE 11-9-25 - - WORSE THAN WORTHLESS! After less than two months the pump would no longer turn off automatically. I contacted the seller, who kindly shipped me a pressure switch, plus a spare one. And so I do not like leaving a poor review, especially when after changing the pressure switch, the pump resumed auto operation (with the same dismal results, as I shall explain) but in the interest of a useful review system, I must. Changing the pressure switch is just two screws and two wires, but it also means – again – having to drain the pipes, and somehow absorb the water that still comes out of the pump. WORSE THAN WORTHLESS! Because I did an awful lot of work for the pump – and for what! The pump is for a tankless toilet. First of all, I built a shelf for the pump suspended with 2x4s from the joists in the basement. But because the pump was VERY loud, I changed the shelf suspensions from 2x4s to fabric-like straps. Then I removed the screws holding the pump to the shelf, placed the pump on foam, and used straps to immobilize the pump. Then I added sound insulation in the area above and nearby the pump. After all this the pump was not as loud as before from upstairs, but still way too loud. While waiting to repair the pump, I plugged the pump onto a wireless RF AC switch, to be able to turn the pump on and off from upstairs, as needed. But because flushing with or without the pump seemed the same, I installed a pressure gauge between the pump and the toilet. When flushing started, the water pressure (per the pressure gauge – which I could monitor with a camera) dropped in half, from an average of some 40 PSI to 20. Turning the pump on, added only TWO PSI to the pressure – if that! Furthermore, if I didn’t turn the pump off before the flushing stopped, when the toiled snapped shut, the pressure jumped to over 100 PSI, and although I would turn the pump off immediately after flushing stopped, the pressure would take a long time to dissipate, so that after one minute, it would still be over 90 PSI. Concerned that the high pressure may damage the toilet’s seals, I installed a bypass pipe, from before to after the pump, which worked better than I expected. With the bypass pipe, the pressure after the flushing ended, and with the pump still on, would rise by some 5 PSI, and within less than a second, it would fall in line with the pressure in the rest of the house plumbing. As before, the pump continued to add two PSI (if that) to the flushing pressure. Now you understand “an awful lot of work”, and why (considering all the work) the pump is worse than worthless.
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Reviewed in the United States on October 21, 2025 by amateur3
Easy to mount, comes with a strainer for the input side, electrical cord is long enough, and works like a champ.
Reviewed in the United States on November 12, 2025 by fresnel
Great Pump. I use it to pump my 55 gal water drum. It's Automatic: Controlled by pressure switch; which I did not see when I bought it. I highly reccomend. Buy the braided, flexible tubing online. couldn't find them ins store at least minimum 45psi, recommended 60 psi food grade.
Reviewed in the United States on August 21, 2025 by Bdog