Switch
turns bilge pump off and on by sensing changes in pressure (caused
by rising or falling bilge water level) in its air tube. No floats
to stick or fill with water.
Approximate levels
are "ON" at 2-3/4" of bilge level and "OFF"
at 1".
Use
with a pump that draws up to 10-amps running continuously or up to
20-amps running intermittently.