Originally Posted by Cormorant
If your holding tank is all above the WL, you can just open the seacock and gravity-drain the tank. You don't need that pump. . . . Can I have it? ;-)
Cormorant, - That's exaclty the system I have on my boat and what is now standard on many of the Moorings Beneteau
boats. Just open the Seacock and the tank empties by gravity feed. Simple.
The question I don't have an answer I don't have an answer to yet, is given the lower pressure of a gravity feed system, what diameter plumbing
does one need to ensure thing will in deed drain. All the Beneteau's I've seen with this system have a discharge larger than the standard 1 1/2.
It's a good system though. I've been very pleased with it.