yacht plumbing plans diagrams etc

Hi all, is anyone able to direct me towards any online sources for full and detailed plumbing plans and specs for midsized yachts (20mish), i've been looking quite hard but seem unable to find anything.I was hoping to find some good ideas, cheers....

 

And while this is in the system, any recomendations about toilet types and preferences? ( from composting to full electronic) for small yachts would be very much appreciated.

 

rwatson,

Private message me and I will send you the info.

 

simple head

I think it is called the Lavac head. Inlet to loop with valved vent to regulate bowl water level, to bowl with air tight seat and lid,bowl outlet to any diaphram pump and onto any di

scharge system

 

ditto on the Lavac, but is it still available?
Sam

 

Easy to build your own, get rid of existing pump on old head and make gaskets old wet suit will due So much simpler, even the diagrams of conventional heads are frightening.