Rule Automatic 800 GPH Bilge Pump 20SA Rule offers the 800 GPH 3028 LPH pump in a round version. This pump features many mounting variations as well as a gas resistant strainer base. Float switches are not required for these fully automatic pumps. Controlled via built-in sensors, the pump will turn on every 2.5 minutes for about 1 second to sense for water. If water is present, the pump will sense resistance and continue to run until all water is removed. Power use in the checking mode is minima