DO NOT use mainline plumbing for switching out your poly b to pex piping! They did our place and quoted 2300 to do the job. Once complete that bill turned into 4500. The work they did was terrible!!! They hacked out holes in the roof and walls with no consideration of having to fix the drywall. We got a quote of 500 extra from our drywall company to cut all of the holes back to square for proper repair. Mainlines response to this was to bad we can’t follow all of our guys around.