tbuck wrote:
Is there any reason why black plastic piping should not be used
to pipe the waste system on a sailboat? Some flex is probably necessary
but the majority could be hard piped. Anyone done it successfully?

Hard pipe is used quite a bit on large yachts, but it's not very
practical for use on the typical boat because it's not recommended for
anything except long straight runs, 'cuz anything else requires a bunch
of unions, all of which have to be cemented, and therefore a place for
a potential leak. It also has to be soft-coupled with about a foot hose
to anything in the system that's fixed or rigid--toilet, y-valve,
thru-hull, pump, tank--that acts a shock absorber and also absorbs flex
in heavy seas or lively tacking. In a system that doesn't have long
straight runs, that means a lot of connections, all of which are a
potential leaker AND places for waste, TP, and minerals to get stuck and
build up.


Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://shop.sailboatowners.com/detai...=400&group=327

http://www.seaworthy.com/html/get_ri...oat_odors.html