The
polyethylene tanks are open inside and have two holes in the bottom
of each tank. When a lift is lowered, water enters the tank via
these holes and air is exhausted through the hose and control manifold.
The lift is raised when the blower motor pushes air into the tanks
displacing the water through the holes. When full, the valve in
the manifold is closed trapping the air in the tank, creating the
buoyancy.
The composite boards provide years of maintenance-free service vs.
carpeting that lasts only a few. The non-abrasive surface of the
composite board does not tear and retain silt and sand that is suspended
in the water.
Leaving your lift in the water during winter is fine as long as
there is no moving ice and it is in the "up" position.
Simply raise the lift to the up position and tie the hose out of
the water if ice is an issue.
Minimum water depth to operate the 4 Point lift and maneuver a boat
is 5'- 6" for 2 tank lifts and 6'-6" for 3 tank lift and
above. For the Pivot lift (front-mount), it is 7' at the rear of
the lift.