Cal Boats CAL 27 Mk III Owner's Manual - Thru-Hull Fittings
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THRU-HULL FITTINGS 31
THRU-HULL FITTINGS
All of the underwater thru-hull fittings are equipped with shut-off valves . These shut-off
valves are to prevent water incursion in the event of a hose f a i lure . These shut-off valves will
also prevent flooding of the head, i f a head valve fails .
ALL THRU-HULL SHUT-OFF VALVES SHOULD BE SHUT OFF, WHEN THE THRU HULLS ARE NOT
IN USE!
This will prevent any problem in case of accident . Be sure to re-open the shut-off valve on
the engine before starting the engine . Following this procedure will result in a secure boat .