---
product_id: 26770777
title: "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: "620.37 DT"
currency: TND
in_stock: true
category: "Seaflo"
url: https://www.desertcart.tn/products/26770777-42-series-on-demand-water-pressure-pump-12v-3-0
store_origin: TN
region: Tunisia
---

# 12V DC power for efficient energy use 3.0 GPM flow rate for steady water delivery Self-priming up to 6 ft for versatile installation 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:** 620.37 DT
**Availability:** ✅ In Stock

## Summary

> 🚿 Elevate your water game—quiet, reliable, and ready wherever life takes you!

## Quick Answers

- **What is this?** 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?** 620.37 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/26770777-42-series-on-demand-water-pressure-pump-12v-3-0)

## 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 3.0 GPM Flow:** Consistent water pressure at 55 PSI keeps your marine or RV system running smoothly without interruptions.
- • **Plug & Play Installation:** Standard 1/2"-14 MNPT ports and mounting footprint make setup seamless in boats, RVs, and tiny homes.
- • **Energy-Smart 12V Operation:** Optimized for low power draw (7.0A), perfect for off-grid and mobile lifestyles demanding efficiency.
- • **Quiet & Smooth Performance:** Internal bypass reduces cycling and noise, ensuring peaceful water flow in tight living spaces.
- • **Built to Last with 4-Year Warranty:** Industry-leading durability backed by CE, RoHS, UL certifications, and a 4-year limited warranty for peace of mind.

## Overview

The SEAFLO 42 Series On Demand Water Pressure Pump delivers a robust 3.0 GPM flow at 55 PSI powered by 12V DC, designed for marine, RV, and off-grid applications. Featuring self-priming up to 6 feet, an internal bypass for reduced cycling, and a quiet Santoprene diaphragm, it ensures smooth, efficient water delivery. Certified safe for potable water and backed by a 4-year warranty, this pump combines durability, easy installation, and energy efficiency for modern mobile lifestyles.

## Description

desertcart.com: 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 : Automotive

## 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.
- [ CERTIFIED FOR POTABLE WATER SYSTEMS ]: Tested to NSF/ANSI/CAN 61 & 372 for safe drinking water contact and evaluated to NSF 24 and UL 778 performance standards, ensuring reliable operation 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 |
|---------------|-------|
| ASIN | B01CQ7DD0S |
| Best Sellers Rank | #3,724 in Automotive ( See Top 100 in Automotive ) #3 in RV Water Pumps & Accessories |
| Brand Name | SEAFLO |
| Color | Orange |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,250) |
| Flow Rate | 3 Gallons Per Minute |
| Included Components | 51S01 Filter, 51F01 Fitting |
| Item Dimensions L x W x H | 7.97"L x 4.92"W x 4.37"H |
| Item Weight | 4.8 Pounds |
| Manufacturer | SEAFLO |
| Manufacturer Part Number | SFDP1-030-055-42 |
| Material Type | Pump head: nylon. Pump head cover: PPS. Motor housing: polypropylene. Valves/seals: EPDM. Diaphragm: Santoprene |
| Maximum Lifting Height | 6 Feet |
| Model Number | SFDP1-030-055-42 |
| Power Source | DC |
| Product Style | 3.0 GPM - 55 PSI |
| Specific Uses For Product | Marine, RV, Off-Grid |
| UPC | 647336945584 715934427631 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts (DC) |

## 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

![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)

## Available Options

This product comes in different **Style** 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.

## 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-07-21*