UNIMER® Drainman® Self-Powered Bilge Pump. Eco-friendly and effective bilge pumping round-the-clock. The Drainman® can be easily installed between a mooring line and the boat. Using the natural force from wind, waves and the jerks that occur in the mooring line, Swedish-made Drainman® is the bilge pump that takes care of pumping water from your boat fully automatically! Drainman can pump up to 2,500 liters (660 gallons) of water a day. Constructed from durable, UV stabilized materials supported by strong UV-resistant polyester webbing that can sustain inline loads of over 3,300 lbs. It's easy to install, and convenient to take along and lock in place. 10' hose included.