Rule offers two different 800 gph models the traditional square version as well as a round version. The square model offers multiple discharge options, as well as a gasoline resistant strainer base.
These pumps have a 3/4" discharge outlet.

"Automatic" models pump when water is sensed in the bilge, and do not require a separate float switch.
"Non-Automatic" (traditional) models are activated by a separate float or panel mounted switch.

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...

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 typical smaller bilge pump, expect an output decrease of approximately 8% per foot of lift.
For these Rule 800 gph pumps, the tested output is about 83% of rated capacity when the maximum height of the discharge hose (not the outlet thru-hull) is 2 ft above the pump, and about 70% of rated output at 4 ft above the pump.
Pump output is further decreased by long discharge runs, any elbows in the discharge line, internal corrugations in the hose selected, etc.

If you have any doubts about the ability of any bilge pump to meet the requirements of your installation, it is always prudent (and not much more expensive) to simply purchase a higher capacity pump.