Design Interior Design PEX Over Copper for the Plumbing at Yök Casa + Cultura By Petz Scholtus is an author, eco-designer, and entreprenuer who started at Treehugger in 2005 as our Barcelona correspondent covering architecture and culture. our editorial process Petz Scholtus Updated October 11, 2018 ©. Marcello Cannarsa Share Twitter Pinterest Email Design Tiny Homes Architecture Interior Design Green Design Urban Design After putting up low-VOC drywalls, we are on to the water installation for yök Casa + Cultura’s eco-renovation. One of our goals is to keep the apartments 100% PVC-free. We also aim to use materials in such a way that they can be recycled in the future. And we don’t believe that all plastics are bad. When it comes to the water pipes, we think that a non-toxic plastic plumbing system is the better solution to the traditional copper one. © Petz Scholtus For our pipes, we use PEX, or crosslinked polyethylene. The tubes are flexible, easy and quick to install, and long-lasting. Uponor explain on their blog that “the process by which copper is mined, refined, transformed into end products, and then used—such as pipe—is very energy intensive, using a great deal of non-renewable energy during its lifetime. In fact, if a Life Cycle Assessment (LCA) is undertaken for both PEX and copper, PEX fare much better. Simply put: during its lifetime, a PEX-based system has a lower overall energy content than a similar system made from copper.” Copper is indeed more expensive, and even though it is also recyclable, requires a lot of energy to do so. Our workers say that installing PEX is much more comfortable than copper. © Marcello CannarsaBenefits of Uponor PEX over Copper and CPVC according to Uponor:- Flexible for fewer fittings, reduced leak-point liability- Resists corrosion, pitting and scaling- Retains more heat in hot-water lines- Resists condensation on cold-water lines- Expands up to 3X its diameter to help resist freeze damage- Connections do not require the use of dangerous chemicals or solvents- Offers a complete lead-free system from inlet to faucet- NSF International certification for water purity- Backed by a 25-year limited warranty on PEX tubing and ProPEX fittings Last but not least, the PEX we buy in Spain is made in Spain, just like our drywalls.