Good morning all,

Does anyone have any knowledge of what type of pipe/hose can be used for freshwater lines?  Looks like my commander has a leak in a few spots for the freshwater system.  I believe it is in both showers, but not 100% sure.  Wondering if I should replace the entire freshwater supply lines.  Can pex be used?  Thanks



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I was planning on replacing my freshwater supply lines this summer with pex. Was going to use the 10' sections of red/blue. Priced out it was higher than the spools but it looks much easier to work with passing it through bulkheads and under the decking. I will be using the plastic Watts quick connects rather than the brass sharkbite.

PEX. I've begun replacing portions of the fresh water system on our Commander with PEX and expect that one day the whole system will be so.



Good morning Jim. I too am replacing my fresh water lines in my 1969 Sports sedan and using PEX. I am fortunate that I run 3 hardware stores so I have a good working knowledge of PEX and the components. Here are some of my suggestions;

1- use the 10' lengths, yes slightly more money but much easier to handle.

2- use chinch clamps and a good ratcheting tool. The ring clamps require a tool that is to big to fit into tight spots.

3- use the plastic fittings not the brass, less money and no lead issues.

4- if you need to use the pipe hangers they come with a nail already inserted. I recommend that you either replace the nail with a stainless steel ring shank siding nail or better yet a S. S. finish screw, much easier in a tight spot.

5- my last suggestion is to make up as much of a run that goes into a tight spot as you can in an open area and than fit it in. A whole lot less bloody knuckles and cursing.

I thought I remember hearing somewhere that the red/blue line and traditional clamps was the better way to go (in terms of stability in a marine environment). That the cinch clamps weren't as reliable. Maybe that's just for us guys in saltwater, though.

This I am not sure of, but the clamps are a solid stainless steel, no fifferent than the ones we use for thru hull fittings. I would agree that the traditional clamps are better, but for the sake of ease I am using the cinch clamps on my refit.

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