"Rich Hampel" wrote in message
...
That would be against ABYS & USCG specifications.
Marine tanks cant have any 'outlet' lower than the top of the tank ...
leakage considerations.
A surveyor would have a heart attack in finding a tank with a 'bottom
tank', your insurance carrier would probably 'not allow' any claim that
resulted in a faulty bottom tap. The CG wouldnt care ... the fine is
the same if you pumped or inadvertantly dumped the oil.

Use a separate 'dip tube' all the way to the bottom for water suction.
OR ... use a 'water knock out pot' as the first stage in the fuel
filtering system ... just an empty filter housing with a bottom tap
thats attached to clear (tygon, etc.) tube. Most of the water will
gravimetrically settle in the 'knockout pot'. When you see water in
the tube you drain it.

:-)


FWIW, Essie was built with a tank that has a bottom tap, and she has been
surveyed more than once. She is also insured. But then, she was built in
1963.