Attwood Shower Sump Pump System - 12V - 750 GPH

The Attwood Shower Sump Pump System - 12V - 750 GPH is a purpose-built marine bilge solution designed for cruising vessels, day boats, and liveaboards who need reliable freshwater drainage in confined spaces. After years on the water, any experienced boater knows that accumulated shower runoff, sink drainage, and condensation management separate a comfortable cabin from a damp, odor-prone environment. This system exists to solve that problem silently and efficiently, removing stagnant water before it becomes a maintenance headache or breeding ground for mold and mildew in your galley or head compartment.

Built by Attwood Marine—a trusted name in marine plumbing for decades—this 12-volt pump delivers 750 gallons per hour of displacement, meaning it clears typical shower and galley drainage quickly without the noise and vibration that plague cheaper alternatives. The 12V direct electrical connection integrates seamlessly into your boat's existing DC system, drawing minimal amperage for extended operation. Compact dimensions of 9 x 5 x 14 inches allow installation in tight bilge cavities or under sink cabinets, while the 3.4-pound weight won't strain mounting brackets or add unnecessary topside burden. The pump operates on standard marine-grade 12-volt power, making it compatible with both battery banks and charging systems found on sailboats, center consoles, and cabin cruisers alike.

This system works best for vessels where traditional gravity drainage isn't feasible—particularly those with heads or shower sump tanks located below the waterline or in low-profile cabin configurations. Installation requires basic plumbing knowledge and standard marine through-hull fittings; the pump accepts inlet and discharge hoses sized to match your boat's existing bilge or sump plumbing. Cruising anglers and liveaboards especially benefit from the silent operation and consistent performance during extended stays at anchor, when stale water removal becomes critical for crew comfort. Pair it with a simple float switch for automatic operation, and you'll spend your time fishing or exploring rather than hand-pumping bilge water or dealing with cabin odors.