Designed to bring pumping power to tight spaces. Rules LoPro Series Bilge Pumps are only 2-1/4" high.

The 900S "Automatic" model pumps when water is sensed in the bilge, and does not require a separate float switch. It also has a second "water depth" mode which activates the pump when the bilge water level reaches 2" or 1.3" (user's choice).
The 900D "Non-Automatic" (traditional) model is activated by a separate float or panel mounted switch - like a traditional electric bilge pump.

These pumps feature a threaded discharge nozzle, and multiple discharge ports are included with the pump 3/4", 1", and 1-1/8" straight hose barbs; as well as a 3/4" 90 elbow port.

Fully rotating discharge body - the entire body swivels up to 180, making the pump extremely easy to install
Backflow prevention
Tricuspid check valves help prevent backflow
Horizontal or vertical mounting
Completely submersible
Rust and corrosion protected
Silent, vibrationless operation
Moisture tight seals
Anti-airlock protection
Compact, energy efficient, long life motor
Able to run dry without motor burn-out
Marine grade sealed wiring
Easy to clean, snap-lock strainer base
Stainless steel shaft
Ignition protected
CE and ISO 8849 certification
3-year limited warranty


Heavy on the technical side...

"Automatic" bilge pumps feature computerized operation based on the principle of impeller resistance. Float switches are not required.
The pump turns on every 2-1/2 minutes for about one second to sense for water in the bilge. If water is present, the pump will sense resistance and continue to run until the water is removed. Thereafter, it continues to check for water every 2-1/2 minutes. Power use in the checking mode is minumal.

Note The capacity of ALL centrifugal bilge pumps, regardless of manufacturer, is rated at "open flow" - with no hoses or resistance to impede output. In actual use, however, the work of lifting the bilge water out of the boat will decrease the output of the pump. The higher the lift, the less the output.
For a smaller bilge pump like this one, expect an output decrease of about 8% per foot of lift about 85% of rated capacity when the outlet thru-hull is 2 ft above the pump, and about 75% of rated output at 3 ft above the pump. Purchase a higher capacity pump if that seems prudent.