House water turned off for 3 hours, house plumbing out of whack - Air in system?

House built in 1995, "normal" home plumbing for Colorado suburbs, master bathroom remodel this month, contractor turned off water for 3 hours to rerun master bathroom shower plumbing, all very very basic stuff.

Here's the rub: hot water is very inconsistent now. HW temp is fine but volume very low, seems to run out after few minutes. HWH is only 2 years old.

Since master remodel is not finished, I haven't turned on all house faucets to purge air.

So my question is: Is it possible that the air left in the house plumbing system (non-recalculating) can cause peculiar behavior among the HWH and general H2O delivery?

If it means anything, this isn't the first time I've seen this behavior after turning off house plumbing.

Solved! New Delta shower mixing valves (the Deltas with external vavles) had NOT been installed so system was "recirculating".

water

A classic example of not enough information about the job to be able to give a good diagnosis. From your original descsription, it implied that that bathroom was complete, and nothing was mentioned about a Delta body being installed, but was not trimmed out. Our crystal balls were out for their 5,000 guess tuneups at the time.