I'm putting in a water line from a new well to my house. I've purchased 250psi 1-1/4" CTS poly tubing, it's about a 230' run. I plan on transitioning to PVC underground outside the pump house before the line goes into the building, and also transitioning to 1-1/4" PVC sleeved in 2" PVC where the line passes through my concrete foundation under my house. I purchased these brass compression fittings to make the transition:
There's also a stainless steel sleeve that goes inside the pipe to help maintain stiffness.
Anyway, my question is if it's safe to bury these fittings underground, or if I should plan on putting a valve box over them to maintain accessibility. The pipe will be 2' below ground, so even with the valve box it won't be easy to service it should it fail in the future.
Also, is my plan to transition to PVC sensible before it enters buildings on either end? After the PVC enters my house there will be a further transition to PEX.