I replaced all of the original grey plastic pipe in our boat. With the exception of a section where someone (ahem, looks at self…) ran a screw through it, it was perfectly serviceable, However, since I am replacing the fixtures in the head and the galley and have adde a transom-mounted cockpit shower I replaced all of it.
I used 1/2” SeaTech polyethylene tubing and associated fittings. The job was fairly easy to do and allowed for the building of a simple manifold on the pressure side of the system for the hot and cold outflows. The best thing that I did was purchase the pipe cutters to insure a clean, 90-degree cut on the ends. Pictures available upon request. Regards, Dave Godwin 1982 C&C 37 - Ronin Reedville - Chesapeake Bay Ronin’s Overdue Refit <http://roninrebuild.blogspot.com/> > On Feb 2, 2019, at 1:57 AM, sender via CnC-List <cnc-list@cnc-list.com> wrote: > > The original grey, opaque plastic pipe that was commonplace in the late 70s & > early 80s was polybutylene. > > My understanding is the issue with this material is in residential use it > split open causing a flood, in situations where pressures AND temperatures > are high (180F). It was taken off the market and companies were, and still > are reluctant to make compatible fittings out of liability fears. Having > said that, I've kept the poly-b in my boat as it unlikely to fail since my my > water is only periodically under pressure, its only 40 psi, and it never gets > really hot. if it was in my house, I'd remove it. > > Vinyl tubing tends to shrink, yellow and harden up over time. > > I'd do 1/4" or 3/8" pex if I was running new, but not sharkbites for > fittings, there are lots of other compression fitting available at lower cost. > > Just my $0.02 > Eric > > On Wed, Jan 30, 2019 at 7:07 AM David via CnC-List <cnc-list@cnc-list.com > <mailto:cnc-list@cnc-list.com>> wrote: > I am sure this has been gone over before...so please indulge me. > > Replacing, re-designing, water lines in 1981 40-2. Pex is the obvious > choice. Are there less obvious (and have cheaper tools required to install) > choices? > > Has anyone improved on the original design? I am thinking of adding easier > accessible manifolds and an additional line for antifreeze and blowing out > water. > > Thanks in advance. > > David F. Risch, J. D. > Gulf Stream Associates, LLC > (401) 419-4650 > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > <https://www.paypal.me/stumurray> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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