Name: Automatic 12V Bilge Pump 500GPH Internal Float Switch Marine Boat RIB
Brand: MidlandMarine
SKU: mms-4355
Price: 39.99 GBP
Availability: InStock
Rating: 5.0 (1 reviews)

Automatic 12v Bilge Pump 500gph With Internal Float Switch Auto 500gph Water Boat Rib - 4Boats

Dispatched in 2-3 days

30 Day Return Policy

Low stock - 3 items left
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.

£39.99

Tax included.

500GPH Automatic Bilge Pump 12V

Internal Float Switch - No Separate Switch Required

This 12V automatic submersible bilge pump is engineered for reliability and ease of installation. Equipped with a built-in electronic reed sensor, the pump automatically activates when water levels rise and shuts off once the bilge is clear, eliminating the need for a separate float switch. Designed specifically for RIBs, speedboats, and small marine vessels, it provides high-performance water evacuation in a compact, durable package.

RELIABILITY: Built with a water-cooled, long-life motor and ignition protection to meet marine safety standards.

Key Features

✔ Fully automatic (Integrated reed sensor)
✔ Rustproof & corrosion-resistant housing
✔ Quick-release strainer for easy cleaning
✔ Silent, vibrationless operation
✔ Manual override capability

Technical Specs

Flow Rate:	500 GPH (1,893 LPH)
Voltage:	12V DC
Outlet Diameter:	19mm (3/4")
Diameter:	85 mm
Height:	105 mm
Shaft:	Stainless Steel

Compatibility / Fitment Guide

Application	Vessel Type	Notes
Marine Bilge	RIBs & Dinghies	Compact fit for tight bilges
Leisure Craft	Speedboats / Day Boats	Automatic 24/7 protection
Livewell/Bait Tank	Fishing Boats	Suitable for water transfer

OEM Cross Reference

RuleMate	RM500A, RM500B
Attwood	Sahara S500 (4505-7)
Seaflo	SFBP1-G500-06
Johnson	Cartridge 500 (32503)

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

We recommend checking the SKU/MPN and Cross Reference list provided above. This unit uses a standard 19mm (3/4") hose and 12V power source, common to most 500GPH installations.

Can this pump be operated manually?

Yes. This pump features a manual override function. To use this, you will need to wire it to a separate manual dash switch alongside the automatic circuit.

Note: Please verify your original part number and dimensions against the specifications above before purchasing. Available at 4boats.co.uk.

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

Free delivery for most items over £150.

Why choose us

QUALITY MARINE PARTS

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

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.

Automatic 12V Bilge Pump 500GPH Internal Float Switch Marine Boat RIB