Hello, and
to the forums. Now, as for replacing your plumbing, what are we talking about? Are you talking about fixtures? Just measure the distance between the handles, and Lowe's, Home Depot, local hardware, etc. will have some the same size. You will need to know how far between the hot and cold handles. If you are talking pipe, if it is gray, it is Quest, and wil be hard to find, and I wouldn't put it back. If it is red for hot, and blue for cold, it is Pex, and can be found at places mentioned above. Takes a crimp tool, and crimp rings to put in, and a special cutter helps too. Good luck with your project.
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LadyWindrider
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT