Do you have PEX for plumbing in Canada? If you do, I highly recommend running any water supply lines with it. It's so easy *I* can use it.
We do have PEX... but I am still nervous about using it. This basement unit would actually be a good test though. My concerns with the plumbing are all on the waste side. I gave our plumber a layout drawing but I don't think he paid much attention to it.
Oh well, "make it work" is my middle name.
There really is not need to be nervous. It makes plumbing 1,000,000% easier. It should make plumbers a little terrified because DIY is getting simpler all the time.
My concerns with it are that in 10 years California will discover that leachate from the PEX causes cancer or that in 10 years the gasketed connections start failing. I've taken a wait-and-see approach on the technology for the past 15 years, but I'm starting to come around to it. This would be a good project for it because...
1. my plumber used PEX to tie the new city water supply to the existing so there is already some in the house
2. The suite will be a "wet-wall" design where all plumbing for the suite is in one wall. If it fails, the sump pit is adjacent to teh wall, so everything should drain to the sump.
3. The suite will be removed if/when we move into the house, so any problems will be torn out in the future anyways.
Its worth considering. OTOH... if I solder copper connections and burn the house down from the basement, insurance pays for replacement.