wrote in message
ups.com...
What are the advantages?
What are the disadvantages?
What are the thru-hull and other unquie requirements for such heads?


http://www.raritaneng.com/products/toilets/index.html

You can get the official line on what these guys claim. I know someone that
had an electric head on their boat, they weren't fond of it, claimed it was
very noisy. Not to mention expensive.

John Cairns