Re: any disadvantages to Pex plumbing?
Copper isn't a panacea, either.
Certain water conditions may cause corrosion of copper, or react with the copper to leach harmful copper compounds into the water.
Some plastics indeed are harmful, but polyethylene is considered a food-safe material by the FDA. Milk jugs are made of polyethylene; paper milk cartons and the lids of glass milk bottles are also coated with polyethylene. Cross-linked polyethylene is even more stable and less likely to leach harmful compounds into the water.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.