RV Plumbing Repair: PEX Tubing and Fittings Posted on May 5, 2013 by Steven Fletcher | 62 Comments Last updated on April 20th, 2019 at 11:57 amRV Plumbing Repair with PEX Modern RVs, made in the last 10 to 15 years, are plumbed using PEX tubing, sometime called…Read more »