My last boat, I installed the tank 4 or 5 feet above the head. Worked great
and the tank could be drained w/o a pump.

"Ryk" wrote in message
news
On Sun, 8 Jan 2006 17:41:16 -0500, "Steve Lortie"
wrote:
Snip
A basic manually pumped marine toilet will pump uphill just fine. All
of my head tank is located above the floor level of the head.

Ryk