Bilge Pump

What Is a Bilge Pump and Why Does Every Boat Need One?

A bilge pump is a device designed to remove excess water from the lowest point of a boat: the bilge. It is one of the most crucial safety features of a boat — without one, excess outside water or leaks can cause a boat to flood or sink. While it may not be the most glamorous piece of gear on board, few items are more essential to the safety of your vessel and everyone aboard.

Where Does Bilge Water Come From?

Most of the time, water in the bilge comes from everyday sources. Rainwater or spray from waves can accumulate while boating, wash-down water may pool in the bilge during cleaning, features like built-in coolers and hatch lips often route water to the bilge on smaller boats, and minor leaks on an inboard boat can also contribute. If left unchecked, this water can cause significant damage — it can corrode electrical systems, damage the boat's structure, and, in severe cases, lead to sinking.

Manual vs. Automatic Bilge Pumps

In addition to manual bilge pumps, there are automatic bilge pumps. These pumps use a float switch to operate automatically — as water in the bilge rises, the float rises and triggers the switch, starting the pump, and when the water level drops, the float lowers and breaks the circuit, stopping the pump. Manual hand pumps, by contrast, require no electricity or batteries, making them a reliable backup option for any boater. Many experienced captains recommend keeping both types on board.

What to Look for When Buying a Bilge Pump

• Pump capacity (GPH): Match the gallons-per-hour rating to the size and type of your vessel for adequate water removal.
• Manual vs. automatic: Automatic pumps offer convenience, while manual pumps provide a dependable no-power backup.
• Corrosion resistance: In a saltwater environment, non-corrosive materials are essential for long pump life.
• Ease of maintenance: Look for pumps that are easy to disassemble and clean, especially if the bilge sees debris or sediment.
• Self-priming capability: Self-priming pumps can start moving water immediately, which matters most in an emergency.

To keep a bilge pump working efficiently, inspect the area around it for debris that could cause clogs — this is especially important on new boats, where construction materials like sawdust, fiberglass dust, foam, and even stray screws can end up in the bilge.

Top Brands in Marine Bilge Pumps

When choosing a bilge pump, the brand matters as much as the specs. Beckson Marine is a name that has earned deep respect among boaters. Beckson was established to manufacture the world's first dependable, self-priming, all-plastic bilge pump, and went on to pioneer the use of plastics to develop an entire line of specialized pumps. For over 50 years, Beckson has manufactured what many consider the world's best all-plastic hand pumps. Their iconic Thirsty-Mate series is a favorite among sailors and recreational boaters alike. The Beckson Thirsty-Mate Hand Pump is a reliable, self-priming solution for manual water transfer on boats, built in the USA from durable, non-corrosive materials, and featuring a comfortable contoured handle and an easy-to-clean design.