---
product_id: 26770777
title: "SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty"
brand: "seaflo"
price: "83093 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Seaflo"
url: https://www.desertcart.hu/products/26770777-seaflo-42-series-on-demand-water-pressure-pump-12v-3
store_origin: HU
region: Hungary
---

# 12V DC power for versatile off-grid use 3.0 GPM flow rate ensures steady water supply Quiet operation with vibration-absorbing base SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty

**Brand:** seaflo
**Price:** 83093 Ft
**Availability:** ✅ In Stock

## Summary

> 💧 Pump up your off-grid lifestyle with quiet, reliable power!

## Quick Answers

- **What is this?** SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty by seaflo
- **How much does it cost?** 83093 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/26770777-seaflo-42-series-on-demand-water-pressure-pump-12v-3)

## 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

- • **Reliable 12V Power:** Perfectly engineered for marine, RV, and off-grid setups demanding consistent 12V DC performance.
- • **Steady 3.0 GPM Flow:** Delivers a smooth 3 gallons per minute at 55 PSI, powering multiple fixtures without pressure drops.
- • **Whisper-Quiet Operation:** Rubber mounting base and Santoprene diaphragm minimize noise and vibration for peaceful water delivery.
- • **Certified & Built to Last:** NSF, UL, CSA certified with a 4-year warranty—trusted durability for potable water in any environment.
- • **Self-Priming & Run-Dry Safe:** Up to 6 ft self-priming capability with built-in run-dry protection ensures uninterrupted, worry-free use.

## Overview

The SEAFLO 42 Series On Demand Water Pressure Pump is a robust 12V DC pump delivering 3.0 GPM at 55 PSI, designed for marine, RV, and off-grid water systems. Featuring self-priming up to 6 feet, run-dry protection, and an internal bypass for smooth, quiet operation, it’s built with durable Santoprene diaphragms and EPDM valves. Certified for potable water use and backed by a 4-year warranty, this pump combines high performance with long-term reliability and easy installation.

## Description

Who is SEAFLO? SEAFLO manufactures high-quality parts and accessories for marine, RV, and agricultural applications. Our products, from water drainage to irrigation systems, are trusted in yachts, RVs, and industrial settings. We are Members of the NMMA! As part of the National Marine Manufacturers Association (NMMA), SEAFLO supports industry leadership through the CSI program. Who is SEAFLO? SEAFLO manufactures high-quality parts and accessories for marine, RV, and agricultural applications. Our products, from water drainage to irrigation systems, are trusted in yachts, RVs, and industrial settings. We are Members of the NMMA! As part of the National Marine Manufacturers Association (NMMA), SEAFLO supports industry leadership through the CSI program. What Makes us Different? As a smaller company, SEAFLO prides itself on personalized attention. We view each sale as a lifelong relationship. Our customers are our backbone, and we’re committed to growing the SEAFLO family together. What makes our products unique? At SEAFLO, we personally test all our products on our own boats and RVs to ensure they meet the highest standards. If we don't trust a product for our own use, we don't sell it. Everything we offer is reliable, durable, and built for real-world performance. What Makes us Different? As a smaller company, SEAFLO prides itself on personalized attention. We view each sale as a lifelong relationship. Our customers are our backbone, and we’re committed to growing the SEAFLO family together. What makes our products unique? At SEAFLO, we personally test all our products on our own boats and RVs to ensure they meet the highest standards. If we don't trust a product for our own use, we don't sell it. Everything we offer is reliable, durable, and built for real-world performance. Water Pressure Pumps Visit the Store Water Pressure Pumps Visit the Store Bilge Pumps Visit the Store Bilge Pumps Marine Toilets Visit the Store Marine Toilets Float Switches Blowers Hatches Fuel/Oil Pumps Washdown

Review: This pump is a workhorse! - Excellent product. Super quiet, very easy to install, perfect fit for my setup, very well made. It comes with a rubber base to absorb vibrations which makes it quieter than it already is. I’ve been using it daily for about a week now without any issues. My daily use is basically to water my garden which takers about 30 minutes of continuous use and supply a toilet and a sink that are off grid. Suction head of my setup is about 2 feet and the other end head is about 10 feet, no issues at all, pressure is great and the auto shut off works flawlessly. Mine is powered by a small battery bank of about 50amps that is connected to a wind generator so is completely off grid. If you want a quiet, powerful, easy to install, great quality 12 volts pump; look no further this is the one you need!!!
Review: High quality, quiet, reliable - I use this pump as the main pump for a domestic water system at my off grid cabin. It's powered by a 12v battery that is charged by a solar panel, and it pulls water from a 100 gallon agricultural spray tank. It has plenty of flow and pressure for washing dishes or taking a shower, and it puts out fairly steady pressure for a diaphragm pump- I haven't needed to add a surge tank. It's mounted to one of the posts under the floor of the cabin and it's quiet enough to not really be very audible when running. It's survived several seasons of use without noticeable wear and tear. I drain it down every winter and remove the screen and have had no freeze damage. The water it pumps from the tank ranges in temperature from 45 degrees to 90 degrees depending on the season and it doesn't seem to make any difference to the pump.

## Features

- [ SPECIFICATIONS ]: Model SFDP1-030-055-42 | Voltage 12V | 3.0 GPM (11.3 LPM) | 55 PSI | Max Draw 7.0A | Self-Priming 6 ft | EPDM Valves | Santoprene Diaphragm | Ports 1/2"-14 MNPT | 4-Year Warranty
- [ 4-YEAR LIMITED WARRANTY ]: Backed by SEAFLO’s industry-leading 4-Year Warranty, ensuring durability, confidence, and long-term protection for freshwater systems in marine, RV, and off-grid installations.
- [ NSF UL CSA CERTIFIED FOR POTABLE WATER ]: Fully certified to NSF/ANSI/CAN 61 & 372, NSF 24, UL 778, and CSA C22.2 No.108, ensuring compliance for safe potable water use in RV, marine, and off-grid pressurized water systems.
- [ HIGH-PERFORMANCE CONTINUOUS-DUTY OPERATION ]: Built for extended runtime, this pump delivers consistent 3.0 GPM flow and 55 PSI pressure, making it ideal for marine, RV, and off-grid systems that demand long-lasting reliability.
- [ SELF-PRIMING WITH RUN-DRY PROTECTION ]: Capable of self-priming up to 6 ft and safely running dry, the pump offers dependable performance during tank changes, low-water events, or installations requiring elevated mounting locations.
- [ INTERNAL BYPASS FOR SMOOTH QUIET FLOW ]: Integrated bypass technology reduces short cycling and pressure fluctuations, producing smoother water delivery and quieter overall operation in on-demand freshwater systems.
- [ DURABLE AND QUIET DESIGN ]: Santoprene diaphragm and EPDM valves provide long-term resistance to wear, while the rubber mounting base reduces vibration and noise for smoother, quieter operation in tight spaces.
- [ EASY INSTALLATION WITH STANDARD MOUNTING PATTERN ]: Features an industry-standard mount footprint and 1/2"-14 MNPT ports, allowing simple integration with common plumbing layouts in RVs, boats, and tiny home water systems.
- [ VERSATILE APPLICATIONS ACROSS MULTIPLE SYSTEMS ]: Ideal for pressurized water systems in RVs, boats, caravans, cabins, and agricultural setups, handling multiple fixtures with reliable performance and low maintenance needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SEAFLO |
| Color | Orange |
| Material | Pump head: nylon. Pump head cover: PPS. Motor housing: polypropylene. Valves/seals: EPDM. Diaphragm: Santoprene Material Pump head: nylon. Pump head cover: PPS. Motor housing: polypropylene. Valves/seals: EPDM. Diaphragm: Santoprene See more |
| Power Source | DC |
| Product Dimensions | 7.97"L x 4.92"W x 4.37"H |
| Style | 3.0 GPM - 55 PSI |

## Product Details

- **Brand:** SEAFLO
- **Color:** Orange
- **Item Weight:** 4.8 Pounds
- **Maximum Flow Rate:** 3 Gallons Per Minute
- **Maximum Lifting Height:** 6 Feet
- **Power Source:** DC
- **Product Dimensions:** 7.97"L x 4.92"W x 4.37"H
- **Style:** 3.0 GPM - 55 PSI
- **Voltage:** 12 Volts (DC)

## Images

![SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty - Image 1](https://m.media-amazon.com/images/I/71GeYf5nuCL.jpg)
![SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty - Image 2](https://m.media-amazon.com/images/I/41F5ig8VDhL.jpg)
![SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty - Image 3](https://m.media-amazon.com/images/I/41K2itjvwGL.jpg)
![SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty - Image 4](https://m.media-amazon.com/images/I/51ILAV3olrL.jpg)
![SEAFLO 42 Series On Demand Water Pressure Pump 12V 3.0 GPM 55PSI, with Bypass for Reduced Cycling, Self-Priming, For Marine/RV/Off-Grid, CE & Rohs Certified, UL Listed, 4-Year Warranty - Image 5](https://m.media-amazon.com/images/I/81aSxFcLAYL.jpg)

## Available Options

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

## Questions & Answers

**Q: Lousy house pressure, if I connect outlet of garden faucet to inlet of this pump will I get better outlet pressure to drive an impact type sprinkler?**
A: No it will not do anything for you... This is also 12V not 110 so maybe you should look into your houses old plumbing or contact city about your low water pressure

**Q: Automatic shut off?**
A: Yes it has a pressure switch that shuts it off when you shut the flow of water off

**Q: What is the power usage for this motor? Amp hours would be best, but pretty much any measure would be helpful.**
A: This is a 12V DC water pressure pump. The max amperage draw is 7.5 Amps. All technical specifications on the pump can be found here: http://seaflo.com/en-us/product/detail/609.html

**Q: What is the wattage need when using a power supply**
A: On the placard for the product that I bought, as well as in the product specs, the amperage is listed as 3.5A, with a maximum of 7.5A(presumably when the pump starts). Ohm’s law states that P=VI, so this yields an average of 12V*3.5A = 42W with a worst case of 12V*7.5A=90W.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This pump is a workhorse!
*by J***C on July 19, 2025*

Excellent product. Super quiet, very easy to install, perfect fit for my setup, very well made. It comes with a rubber base to absorb vibrations which makes it quieter than it already is. I’ve been using it daily for about a week now without any issues. My daily use is basically to water my garden which takers about 30 minutes of continuous use and supply a toilet and a sink that are off grid. Suction head of my setup is about 2 feet and the other end head is about 10 feet, no issues at all, pressure is great and the auto shut off works flawlessly. Mine is powered by a small battery bank of about 50amps that is connected to a wind generator so is completely off grid. If you want a quiet, powerful, easy to install, great quality 12 volts pump; look no further this is the one you need!!!

### ⭐⭐⭐⭐⭐ High quality, quiet, reliable
*by J***T on July 4, 2025*

I use this pump as the main pump for a domestic water system at my off grid cabin. It's powered by a 12v battery that is charged by a solar panel, and it pulls water from a 100 gallon agricultural spray tank. It has plenty of flow and pressure for washing dishes or taking a shower, and it puts out fairly steady pressure for a diaphragm pump- I haven't needed to add a surge tank. It's mounted to one of the posts under the floor of the cabin and it's quiet enough to not really be very audible when running. It's survived several seasons of use without noticeable wear and tear. I drain it down every winter and remove the screen and have had no freeze damage. The water it pumps from the tank ranges in temperature from 45 degrees to 90 degrees depending on the season and it doesn't seem to make any difference to the pump.

### ⭐⭐⭐⭐⭐ Good pump
*by M***E on November 14, 2025*

Easy installation. Good flow. so far is working great.

## Frequently Bought Together

- SEAFLO 42 Series 12V 3.0 GPM 55PSI Continuous Duty Diaphragm Pump with Bypass for Reduced Cycling, Fresh/Salt Water, 4-Year Warranty, UL & CSA Certified, Self-Priming for Marine, RV, Off-Grid, Boats
- SEAFLO Accumulator Tank Water Pump Flow Control with Internal Bladder - 125 PSI, 23.5 oz (0.75 L) | Reduces Pump Cycling and Smooths Water Flow for Marine, RV, and Off-Grid Systems

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-14*