On Sun, 20 May 2012 07:06:06 +0700, Bruce
wrote:

But this does not disguise the fact that you obviously have limited
experience with boats, particularly sail boats which often have built
in tanks, usually deep in the bilges (to aid stability) which, being
the lowest things in the boat, preclude the use of "drain valves".

===

Wilbur uses an outboard motor thus reducing his tank complexity to the
bare minimum. :-)