Submersible Bilge Pumps

Water in the bilge is a constant concern, whether you sail or motor. A submersible pump must always be ready to act, ensuring rapid drainage overboard. This is not just about cleanliness; it is a matter of safety: standing water in the bilge accelerates corrosion of through-hull fittings, degrades hull fibers, and puts batteries positioned low in the boat at risk. A properly sized pump lets you sleep soundly even after sailing in rough conditions.

When selecting a pump, do not focus only on price or size. The key figure is flow rate, usually expressed in liters/hour or liters/minute. Always verify whether the stated flow rate is measured at zero head or under real conditions, as discharge height dramatically affects actual performance. Also consider the discharge hose diameter: an undersized system creates back-pressure and causes premature wear of the pump's electric motor.

At Nautiba, our approach is technical and pragmatic. We do not simply deliver a component; we verify that your choice matches your system's characteristics. If you have questions about electrical compatibility or outlet diameters, ask us for advice before completing your order. Our shipping management lets you know expected delivery times clearly, avoiding unnecessary waits when your boat is hauled out or in the yard.

Remember that the activation system is just as critical as the pump itself. Whether you prefer a separate float switch or a pump with an integrated sensor, make sure the activation system is protected from the elements. A float that jams is, in effect, a pump that does not exist.

Criteria to get the selection right

• Verify the actual hourly flow rate based on the height the water column must overcome.
• Check your system voltage: 12V or 24V are standard, but the error is always a possibility.
• Assess the physical space available for installation and ease of access for periodic cleaning.
• Make sure the IP protection rating is adequate for the type of installation.
• Verify the outlet fitting diameter, which must match the discharge hose already on board.

How often should the bilge pump be tested?

It is advisable to test the pump and float switch at least once a month, especially if the boat sits in the marina for extended periods.

How can I tell if the pump has burned out?

If the pump is powered but does not run, first check the fuse and wiring condition. If 12V or 24V is present at the terminals but there is no current draw, the electric motor is likely open-circuit or jammed by debris.

Can the float stay permanently engaged?

Yes, automatic pumps or pumps with floats are designed to remain under constant voltage, as long as the circuit is protected by an adequate fuse and the system is in good condition.

Is an automatic or manual pump better?

An automatic pump is essential for safety when the boat is unattended. A manual pump is useful as a backup system or for controlled drainage during maintenance.