Name: Attwood 5143-4 MK2 Marine Shower Sump Pump System 12V 800 GPH Large Box
Brand: BARRUS
SKU: 5143-4
Price: 134.95 GBP
Availability: InStock

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

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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.

Why choose us

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

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

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