Rule Shower Drain Box w/800 GPH Pump - 24V

The Rule Shower Drain Box with 800 GPH Pump – 24V is an essential component for any cruising boat or vessel with a shower system. After years on the water, every experienced boater knows that reliable bilge and drain management is critical to keeping your cabin dry and your marine systems functioning properly. This self-contained drain box eliminates the need for complex plumbing by automatically pumping shower water overboard, keeping your bilge free from accumulating gray water and protecting your vessel's integrity.

Engineered by Rule—the trusted name in marine pumping systems—this 800 GPH pump operates on 24-volt DC power, making it ideal for larger cruising vessels and cabin boats with onboard power systems. The compact drain box design fits neatly in tight spaces while the robust pump handles continuous duty cycles without fail. At 4.2 pounds and measuring 10 x 6 x 14 inches, the unit installs easily in engine rooms, cabin soles, or dedicated bilge areas, drawing minimal power while delivering the flow rate you need to keep shower sumps clear and functioning.

This drain box is essential for liveaboards, offshore cruisers, and weekend warriors alike who refuse to compromise on comfort or vessel maintenance. The 24-volt system integrates seamlessly with standard marine electrical architecture, and Rule's proven design ensures years of worry-free operation. Whether you're anchored offshore for weeks or running the cruising circuit, the Rule Shower Drain Box prevents water buildup, odors, and potential structural damage—making it one of the smartest investments you can make in your boat's health and your comfort at sea.