Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box

Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box

5143-4

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£134.95
/
Tax included.

Attwood 800 GPH Shower Sump MK2 (5143-4)

Premium 12V Grey Water Management System

The Attwood MK2 Shower Sump System (5143-4) is an industry-leading solution for managing grey water from showers, sinks, and galley drains. This "Large Box" version provides increased capacity and high-flow performance, ensuring rapid drainage even in high-demand marine or RV environments.

INNOVATION: Featuring the patented X-Air™ Impeller, this system eliminates airlocks in the pump and pipework, ensuring reliable operation without manual intervention.

Key Features

  • ✔ Snap-in lid with gasket seal prevents overflow
  • ✔ Integrated float switch for automatic operation
  • ✔ Internal air vent prevents airlocks
  • ✔ Easy-clean mesh filter & clear inspection lid
  • ✔ ABYC & USCG compliant for marine safety

Technical Specs

Voltage: 12V DC
Flow Rate: 800 GPH
Amp Draw: 2.5A - 3.3A
Fuse Size: 5A
Outlet Port: 3/4" I.D.
Inlet Ports: 3/4", 1", 1-1/8", 1-1/2"
Wire Length: 22" (22 AWG)

Compatibility / Fitment Guide

Application System Type Notes
Marine Vessels Grey Water System Suitable for boats with multiple drains
RV / Camper Van Shower & Sink Drainage Ideal for compact off-grid plumbing
AC Condensate HVAC Drainage Prevents standing water in AC pans

OEM Cross Reference

Attwood (Legacy) 4143-4
UPC Reference 022697029003
Replacement Parts AK5143-4 (Lid & Valve Kit)

Questions & Answers

Is this a genuine original part?

Yes, this is a genuine Attwood Marine product, ensuring full compliance with USCG and ABYC safety standards for marine plumbing.

How do I know if it is compatible?

If you are replacing an older Attwood model 4143-4 or any sump system requiring an 800 GPH 12V pump with a 3/4" outlet, this MK2 unit is the direct factory-recommended upgrade.

Does this unit prevent backflow odors?

Yes, the 5143-4 MK2 includes an integrated check valve on the discharge port to prevent water and sewer odors from returning to the sump box and cabin.

Note: Please verify your original part number and mounting space (Large Box dimensions) before purchasing. For technical support, visit 4boats.co.uk.

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

Free delivery for most items over £150.

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