---
product_id: 12347239
title: "SEAFLO 33 Series 12V RV Water Pump, 3.0 GPM 45 PSI Diaphragm Pump, On Demand Fresh Water Pump for RV Camper Boat Marine, Self Priming Pressure Pump, NSF UL Certified, 4-Year Warranty"
brand: "seaflo"
price: "€ 117.26"
currency: EUR
in_stock: true
reviews_count: 11
category: "Seaflo"
url: https://www.desertcart.pt/products/12347239-seaflo-33-series-12v-rv-water-pump-3-0-gpm
store_origin: PT
region: Portugal
---

# 12V DC power 3.0 GPM flow rate 45 PSI pressure SEAFLO 33 Series 12V RV Water Pump, 3.0 GPM 45 PSI Diaphragm Pump, On Demand Fresh Water Pump for RV Camper Boat Marine, Self Priming Pressure Pump, NSF UL Certified, 4-Year Warranty

**Brand:** seaflo
**Price:** € 117.26
**Availability:** ✅ In Stock

## Summary

> 💦 Pump up your adventure with quiet, reliable flow—because your water deserves the best!

## Quick Answers

- **What is this?** SEAFLO 33 Series 12V RV Water Pump, 3.0 GPM 45 PSI Diaphragm Pump, On Demand Fresh Water Pump for RV Camper Boat Marine, Self Priming Pressure Pump, NSF UL Certified, 4-Year Warranty by seaflo
- **How much does it cost?** € 117.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/12347239-seaflo-33-series-12v-rv-water-pump-3-0-gpm)

## Best For

- seaflo enthusiasts

## Why This Product

- Trusted seaflo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless On-Demand Water Flow:** Automatic pressure switch activates pump only when you need it—hands-free convenience for your RV or boat.
- • **Quiet & Vibration-Free Operation:** Ultra-quiet rubber mounting base ensures whisper-quiet performance, so your adventures stay peaceful.
- • **Certified Safe for Drinking Water:** NSF, UL, and CSA certifications guarantee clean, potable water wherever you roam.
- • **Built to Last with 4-Year Warranty:** Industry-trusted durability backed by a 4-year limited warranty—reliable performance for years of off-grid living.
- • **Supports Multiple Fixtures Simultaneously:** Delivers steady water flow to up to 4 fixtures at once—perfect for showers, sinks, and toilets without pressure drops.

## Overview

The SEAFLO 33 Series 12V RV Water Pump delivers a robust 3.0 GPM flow at 45 PSI with a self-priming diaphragm design, certified safe for potable water by NSF, UL, and CSA. Engineered for quiet operation and equipped with an automatic pressure switch, it supports up to four fixtures simultaneously. Trusted by top RV manufacturers and backed by a 4-year warranty, this pump ensures dependable, hands-free water delivery for RVs, boats, and off-grid setups.

## Description

desertcart.com: SEAFLO 33 Series 12V RV Water Pump, 3.0 GPM 45 PSI Diaphragm Pump, On Demand Fresh Water Pump for RV Camper Boat Marine, Self Priming Pressure Pump, NSF UL Certified, 4-Year Warranty : Automotive

Review: So far appears to be a great value fresh pump. - Only 2 months in, so durability not evaluated yet. Overall whilst I haven't experienced any measure of longevity yet, the "fit, form and function" of this fresh pump seems to be quite the value for basic needs such as mine. Surely not the same total experience as a higher flow pump with multiple diaphragms and increased noise abatement, but for those who don't need such a premium experience (with quite dear costs) this pump is quite nice and presents much better value IMO. Bottom line: - Noise level: Not measured, but quite acceptable to me. With it mounted directly under the berth I *do* hear it throughout the boat, however at absolutely minimal volumes that I don't foresee waking anyone except the lightest sleeper. If the tank goes empty and it starts pushing air it will hammer a bit. Some day I'll break out the db meter and measure this. - On demand sensing works great - when I turn on the faucet, water is there and continues to be there. This is perhaps the most important aspect to creating an "at home" experience - no footswitches or pumps, not buttons, just a regular ole faucet. - No hammering or surging even with just a single diaphragm until water gets low - if it starts drawing air then it hammers. To be frank I like this as I don't have a gauge in my fresh tank, so this acts as my alert that water if very low. - While I have only two faucets, the flow is quite sufficient. Wash dishes, even rinse down cabin floor or countertop without any problem. - Same install as any other pump, quite easy particularly when combined with pex. I have to remind myself to take some photos / videos for everyone. I used this to replace a manual freshwater plumbing system in my sailboat and honestly I kind of hate the maritime industry, so when I saw an item that was more appropriately priced for it's design and manufacturing costs, I decided to give it a try. I'm very glad I did, this little guy so far is proving itself out very nicely. I've already recommended it to several rag haulers who are still pumping faucets.
Review: Amazingly quiet and effective pump for our RV - We have an older (1991) motorhome that still had its original water pump. Since we bought the RV when it was already 27 years old, we didn't think much about how noisy the old pump was when it ran and how much it vibrated all the pipes. It got so bad that it actually cracked a PEX connector in my plumbing from all the vibration. Fortunately we caught it before too much of a flood. That was the incentive to look for a better pump in hopes of getting one that would be quieter and not vibrate the whole RV when you flushed the toilet. After doing quite a bit of research and looking at reviews we chose the SeaFlo pump. It's a good name brand and had a reputation of being relatively quiet. We couldn't be happier with it. We installed it with a SeaFlo Accumulator tank (0.75 l) and after hooking it up and wiring it up I went ahead and turned it on. At first I thought it wasn't working because I didn't hear ANYTHING! However the water started coming out the faucet and when I got closer to it or put my hand on the pump it was clear it was in fact working, but was living up to its QUIET reputation. I highly recommend this pump. You could spend less on a cheap knockoff import unit, but seriously is it really worth saving a few dollars on something that probably won't last and may be rather noisy when you can get the best with SeaFlo. And no, I'm not paid by SeaFlo to do this review, I'm just incredibly impressed with the quality and want to share that.

## Features

- [ SPECIFICATIONS ]: Model Number: SFDP1-030-045-33 | Voltage: 12V | Open Flow: 3.0 GPM (11.3 LPM) | Shut-Off Pressure: 45 PSI (3.1 BAR) | Priming Capabilities: 6 feet (1.8 meters) | Max Temperature: 140°F (60°C) | Ports: 1/2"-14 MNPT | Material: EPDM Valves / Santoprene Diaphragm.
- [ 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 SEAFLO’s 4-Year Limited Warranty, this pump is built for long-term reliability and peace of mind. Designed for tough freshwater demands, it’s the perfect choice for RVs, boats, cabins, and off-grid living where consistent performance is critical.
- [ HIGH-PERFORMANCE 3-CHAMBER DIAPHRAGM DESIGN ]: The advanced three-chamber diaphragm provides reliable 3.0 GPM flow at 45 PSI for consistent water delivery in marine, RV, and off-grid systems. This design minimizes cycling, ensures steady pressure, and enhances durability. Ideal for applications requiring moderate pressure and smooth performance.
- [ #1 TRUSTED OEM PUMP BRAND BY THE RV INDUSTRY ]: SEAFLO is the #1 OEM pump brand used by leading RV manufacturers across the USA. The 33 Series is trusted as factory-installed equipment for Forest River, Thor, Grand Design, Rev Group, Brinkley RV, Winnebago, and more, proving its reliability and widespread adoption in RV water systems.
- [ SUPPLIES UP TO 4 FIXTURES SIMULTANEOUSLY ]: This pump is engineered to supply up to four water fixtures at the same time, making it ideal for cabins, boats, and RVs. Enjoy steady flow to sinks, showers, and toilets without pressure drop. A true on-demand system built to deliver consistent performance across multiple outlets.
- [ AUTOMATIC ADJUSTABLE PRESSURE SWITCH FUNCTIONALITY ]: Equipped with a built-in automatic pressure switch, the pump starts and stops based on water demand. Adjust the pressure value by turning the screw, pressure range is 17-60PSI. It activates when a faucet is opened and shuts off when closed, giving you a truly automated system. Ideal for hands-free use in RVs, boats, or any remote plumbing setup.
- [ ULTRA-QUIET VIBRATION DAMPENING MOUNT ]: Includes a noise-reducing rubber mounting base that minimizes vibration and noise during operation. Perfect for quiet environments like RV interiors and marine cabins, it ensures smooth, silent performance without disruptive sounds even under full load.
- [ SELF-PRIMING AND RUN DRY CAPABILITY ]: The pump features self-priming up to 6 feet and can run dry without damage, providing installation flexibility above tank level and added protection in intermittent-use systems. This capability prevents internal damage and makes it perfect for varying water system needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00P8BE6S8 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #1,059 in Automotive ( See Top 100 in Automotive ) #1 in RV Water Pumps & Accessories |
| Brand | SEAFLO |
| Color | White, Black, Orange |
| Customer Reviews | 4.4 4.4 out of 5 stars (8,485) |
| Date First Available | November 4, 2014 |
| Global Trade Identification Number | 00637776648008, 00647336944273, 00793945653393 |
| Included Components | (1) SEAFLO 33-Series Diaphragm Pump (1) Set of Instructions (2) 1/2" Barbed Hose Adaptors (1) 50 Mesh Inlet Strainer |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.2 pounds |
| Item model number | SFDP1-030-045-33 |
| Manufacturer | SEAFLO |
| Material | EPDM, Santoprene |
| Maximum Flow Rate | 3 Gallons Per Minute |
| Maximum Lifting Height | 6 Feet |
| Part Number | SFDP1-033-045-33 |
| Power Source | dc |
| Product Dimensions | 7.84"L x 5"W x 4.62"H |
| Special Features | Automatic pressure switch |
| Specific Uses For Product | Potable Water Pump |
| Style | 3.0 GPM - 45 PSI |
| UPC | 793945653393 039923319654 647336944273 637776648008 |
| Voltage | 12 Volts (DC) |
| Warranty Description | 4-Year Warranty |

## Product Details

- **Brand:** SEAFLO
- **Color:** White, Black, Orange
- **Item Weight:** 4.2 Pounds
- **Material:** EPDM, Santoprene
- **Maximum Flow Rate:** 3 Gallons Per Minute
- **Maximum Lifting Height:** 6 Feet
- **Power Source:** dc
- **Product Dimensions:** 7.84"L x 5"W x 4.62"H
- **Style:** 3.0 GPM - 45 PSI
- **Voltage:** 12 Volts (DC)

## Images

![SEAFLO 33 Series 12V RV Water Pump, 3.0 GPM 45 PSI Diaphragm Pump, On Demand Fresh Water Pump for RV Camper Boat Marine, Self Priming Pressure Pump, NSF UL Certified, 4-Year Warranty - Image 1](https://m.media-amazon.com/images/I/71p2tgUhicL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Can you adjust the "shut-off" pressure down from 45 PSI?**
A: Locate the allen screw on the pressure switch located on the front of the pump, use an allen key to turn it clockwise to increase pressure or counterclockwise to decrease pressure.

**Q: Can you hook up to 3/4 pex?**
A: The output is 1/2" MNPT. You would need a 1/2"FNPT to 3/4" Pex Fitting

**Q: could this pump, pump water up 6 feet**
A: Yes, this pump will both pull and push water up 6 feet.

**Q: Why will my pump make noise but not pump water. It has been dry for 5 days of travel. Now we are parked and it’s not working.**
A: 2 possible problems come to mind.   The pump is self priming, as long as there is water in the tank getting to the pump it should work.   There is a possibility that it was installed the wrong way, there is an intake opening and an output opening.   Check that, it could be the problem.  The pump could also be defective if there is water getting to it and it is installed correctly but still not working...

## Customer Reviews

### ⭐⭐⭐⭐⭐ So far appears to be a great value fresh pump.
*by M***N on September 30, 2022*

Only 2 months in, so durability not evaluated yet. Overall whilst I haven't experienced any measure of longevity yet, the "fit, form and function" of this fresh pump seems to be quite the value for basic needs such as mine. Surely not the same total experience as a higher flow pump with multiple diaphragms and increased noise abatement, but for those who don't need such a premium experience (with quite dear costs) this pump is quite nice and presents much better value IMO. Bottom line: - Noise level: Not measured, but quite acceptable to me. With it mounted directly under the berth I *do* hear it throughout the boat, however at absolutely minimal volumes that I don't foresee waking anyone except the lightest sleeper. If the tank goes empty and it starts pushing air it will hammer a bit. Some day I'll break out the db meter and measure this. - On demand sensing works great - when I turn on the faucet, water is there and continues to be there. This is perhaps the most important aspect to creating an "at home" experience - no footswitches or pumps, not buttons, just a regular ole faucet. - No hammering or surging even with just a single diaphragm until water gets low - if it starts drawing air then it hammers. To be frank I like this as I don't have a gauge in my fresh tank, so this acts as my alert that water if very low. - While I have only two faucets, the flow is quite sufficient. Wash dishes, even rinse down cabin floor or countertop without any problem. - Same install as any other pump, quite easy particularly when combined with pex. I have to remind myself to take some photos / videos for everyone. I used this to replace a manual freshwater plumbing system in my sailboat and honestly I kind of hate the maritime industry, so when I saw an item that was more appropriately priced for it's design and manufacturing costs, I decided to give it a try. I'm very glad I did, this little guy so far is proving itself out very nicely. I've already recommended it to several rag haulers who are still pumping faucets.

### ⭐⭐⭐⭐⭐ Amazingly quiet and effective pump for our RV
*by R***S on March 12, 2025*

We have an older (1991) motorhome that still had its original water pump. Since we bought the RV when it was already 27 years old, we didn't think much about how noisy the old pump was when it ran and how much it vibrated all the pipes. It got so bad that it actually cracked a PEX connector in my plumbing from all the vibration. Fortunately we caught it before too much of a flood. That was the incentive to look for a better pump in hopes of getting one that would be quieter and not vibrate the whole RV when you flushed the toilet. After doing quite a bit of research and looking at reviews we chose the SeaFlo pump. It's a good name brand and had a reputation of being relatively quiet. We couldn't be happier with it. We installed it with a SeaFlo Accumulator tank (0.75 l) and after hooking it up and wiring it up I went ahead and turned it on. At first I thought it wasn't working because I didn't hear ANYTHING! However the water started coming out the faucet and when I got closer to it or put my hand on the pump it was clear it was in fact working, but was living up to its QUIET reputation. I highly recommend this pump. You could spend less on a cheap knockoff import unit, but seriously is it really worth saving a few dollars on something that probably won't last and may be rather noisy when you can get the best with SeaFlo. And no, I'm not paid by SeaFlo to do this review, I'm just incredibly impressed with the quality and want to share that.

### ⭐⭐⭐⭐⭐ BEST BUY EVER
*by B***9 on September 21, 2025*

1 Car Battery 1 Regular size hose 5/8 or 3/4 2 Hose iron Clumps or fasteners or whatever It works great, easy set up and it silent like it like a mini fan. The size fits anywhere, it looks pretty good and doesn't take up plenty of space. It last plenty long and it is durable I dropped it before I even used it for the first time. I thought that it would be the end of the world if it did not work, but it worked fine. The pressure is good i would get a few gallons in less than minutes. YES I WOULD BUY IT AGAIN.

## Frequently Bought Together

- SEAFLO Water Diaphragm Self Priming Pump 3.0 Gallons/min (11.3 Lpm) 45 PSI New Rv/Marine 12 Volt Dc / 12 V Demand Fresh
- ML7-12 - 12 VOLT 7.2 AH SLA BATTERY - Mighty Max Battery brand product, black

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-08*