SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine
SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine

SEAFLO 12V 42-Series Water Pressure Pump 3.0 GPM 55 PSI SFDP1-030-055-42 Marine

DP103005542

  • Dispatched in 2-3 days
  • 30 Day Return Policy
  • In stock, ready to ship
  • Backordered, shipping soon
Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.
£87.97
/
Tax included.

Seaflo SFDP1-030-055-42 Water Pump

42-Series 12V | 3.0 GPM | 55 PSI | Internal Bypass

The Seaflo 42-Series is a heavy-duty, self-priming diaphragm pump designed for high-volume water transfer in marine, RV, and agricultural environments. This 4-chamber positive displacement pump features a unique internal bypass technology which significantly reduces pump cycling, providing a smoother, quieter flow without the absolute necessity of an accumulator tank.

RELIABILITY: Engineered for continuous duty performance with Santoprene diaphragms and EPDM valves for maximum durability against corrosion and abrasion.

Key Features

  • ✔ Self-Priming: Up to 6 vertical feet (1.8m)
  • ✔ Run-Dry Safe: Can operate without water without damage
  • ✔ Quiet Operation: Rubber mounting base isolates vibration
  • ✔ Internal Bypass: Reduces rapid on/off cycling
  • ✔ Adjustable Switch: Factory set at 55 PSI

Technical Specs

Voltage 12V DC
Flow Rate 3.0 GPM (11.3 LPM)
Shut-off Pressure 55 PSI (3.8 BAR)
Max Amp Draw 7.5 Amps
Ports 1/2"-14 MNPT
Leads 16 AWG, 9.4" Long

Compatibility / Fitment Guide

Application System Type Notes
Marine / Yacht Freshwater Systems Supports up to 3-4 fixtures simultaneously.
RV / Caravans On-board Water Tanks Direct replacement for most standard RV pumps.
Off-Grid Cabin Solar Water Systems Low power consumption/high efficiency.

OEM Cross Reference

Seaflo MPN SFDP1-030-055-42
Shurflo Equivalent 4008-101-A65 / 4008 Series
UPC 0817683020474

Questions & Answers

Is this a genuine original part?

This is a genuine Seaflo 42-Series pump, a leading choice for premium aftermarket marine and RV water systems worldwide.

How do I know if it is compatible?

Verify that your existing system uses a 12V DC power source and 1/2" threaded fittings. This pump is a standard footprint replacement for most Shurflo and Flojet 3.0 GPM models.

What is the benefit of the Internal Bypass technology?

The internal bypass allows the pump to "re-circulate" water within the head when demand is low. This prevents the pump from rapidly turning on and off (cycling), which reduces noise and extends the life of the motor and pressure switch.

Note: Please verify your plumbing requirements and voltage before installation. Standard 1/2" MNPT fittings are required for connection. For support, visit 4boats.co.uk.

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

You may also like

Recently viewed

Why choose us

Quality marine parts and boat equipment from 4Boats UK

QUALITY MARINE PARTS

We source dependable marine products from established suppliers and continually refine our range using customer feedback.

Untitled_1080_x_1080_px_2 - 4Boats

TRUSTED SUPPLIERS

We work with trusted marine suppliers and distribution partners to provide reliable parts, equipment and fulfilment.

Simple_Image_Play_Built_into_Routine_Cosmetics_TikTok_In-Feed_Ad_1080_x_1080_px_10 - 4Boats

PERSONAL SERVICE

Every order is checked by the 4Boats team. Contact us before ordering if you need help with part numbers, compatibility or availability.