Kitec piping has created alot of work for companies that specialize at repiping houses. Vegas water has alot of minerals in it which contributes to the fittings failure. The Kitec fitting system is flawed and 10s of thousands of Las Vegas homes have been repiped because of this. Construction defect attorneys are the real winners out of all of this. I don't care much for defect attorneys because they drive up our general liability insurance. Anyway, I have installed Wirsbo/Uponor piping with plastic fittings and had no problems for the last 8 years although I've recently seen some copper to pex brass adaptors failing. The water out here is very hard on any type of metal pipe or fitting. I have used Vanguard Pex and had no problems to date, but I'm wondering about those brass fittings.