I am in the process of re-plumbing my entire boat with 3/8" pex tubing and sharkbite brass barbed fittings that use the compression
rings. I purchased everything on Amazon but Home Depot does carry a few of the basic 3/8" fittings. People mention the really expensive compression
tool but it is only around $25 on Amazon.
I am using a Manabloc water
manifold and each circuit is a home run, not daisy chained from one fixture to another. The will allow me to turn off/on each water circuit independently for maintenance
I have a fairly complex water system with 2 heads/showers/sinks, galley
machine, ice maker, watermaker
So far I am really impressed with how easy the tube is to route
and how well the fittings install.