Understanding bilge pumps
Bilge pumps are essential for managing spray, rainwater, and normal water accumulation from seepage, spillage, or melting ice. Most boats have one or more for these purposes.
Limitations of bilge pumps
Bilge pumps are not designed to handle extraordinary water events such as broken skin fittings, excessively leaking shaft glands, or rogue waves. Leaving large amounts of water in the bilge can destabilise your boat, accelerate corrosion, and promote osmotic blisters in fiberglass hulls. Excessive water ingress can ultimately sink the vessel.
Proper use
Bilge pumps control small amounts of water. They are generally insufficient to manage water ingress from hull damage or plumbing failures. Never leave a boat with a known leak, hoping the pump will keep it afloat. If your boat leaks, get it fixed immediately.
High water alarms
High water alarms activate when water reaches a predetermined level, potentially saving your boat.
An insurance analysis by Boat US shows that 69 percent of boats sink while docked, highlighting the importance of an audible alarm.
Bilge pumps installation
Consider installing separate bilge alarms for each bilge area with an indicator light, an audible alarm, and a label to indicate the area involved. At a minimum, install a high-water alarm in the engine room or machinery space, as these areas typically have more thru-hull penetrations.
Alarm placement and maintenance
Place the detector switch high enough above the normal bilge water level to prevent false alarms but low enough to alert you to real problems. The same issues that affect bilge pumps, such as corroded wire connections and jammed switches, can also affect high-water alarms. Regularly check float switches.
Common causes of docked boat sinkings
Insurance claims reveal that boats often sink at the dock due to water entering through sterndrive bellows, leaking cockpit and live well plumbing, and shaft and rudder seals. Follow recommended maintenance intervals for related equipment to prevent these issues. Our team provide professional vessel management if you would prefer someone else to handle the routine maintenance.
Conclusion
Understanding bilge pumps and their limitations is crucial for maintaining your boat. Regular maintenance and proper alarm systems can prevent significant water ingress and potential sinking. Ensure your pump and alarm systems are in good working order to keep your vessel safe.
