Rules submersible pump series RULE LoPro 900 is an extremely flat submersible pump that can also be found in tight bilges. The pump is available in 2 versions. Model 900D is in conventional design and requires a float switch and/or manual switch. Model 900S has a two-stage adjustable level sensor. The pump starts when the water reaches a height of 3 or 5 cm depending on the desired setting. The pump starts briefly every 2.5 minutes and checks whether water is in the bilge. If water is standing, the pump runs until all water is pumped away. For easier installation, the outlet can be rotated continuously by 180° The design of the outlet with thread allows you to screw different outlet pieces. The following outlet connections are included: 19 mm (3/4 inch) straight and angled as well as for 25 mm (1 inch) and 28 mm (1-1/8") hoses. The check valve prevents water from reflowing back into the bilge. The 900 series can be installed horizontally and vertically.