I’ve long thought that plumbing should use flexible hoses and snap on connectors or barbed fittings like those in in boats and RVs (recreational vehicles) instead of rigid pipe with soldered joints. Now it is available for residential and commercial use in a material called PEX. Unlike PVC, PEX does not shatter if the pipes freeze.
The PEX system would be great for a marine environment to avoid corrosion. It is very amenable for do-it-yourself installation, similar to running coax cable with its crimp-on connectors.
Pex is an excellent product. It is comparable to copper pipes for longevity if used with city water, and superior if used with well water (less problems with corrosion and scaling, and only at the joints).
Two things to be aware of:
(1) Exposure to the sun will weaken and degrade PEX.
(2) I’m unaware of how PEX performs in a fire, but any time plastics or similar materials are used in major construction projects, this needs to be considered.
For small structures where fire codes do not need to be so stringent, PEX is a great choice as long as you protect it from the sun.
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