The “rough plumbing” according to EVERY CONTRACT I have ever signed was the following.
The installation of all soil, waste and vent piping and water risers and branches.
The installation of gas piping risers with nipples and caps exposed for the finish work.
The sprinkler risers and branches with piping set with caps and no sprinkler heads in place until completion (then the final test)
There 2 inspections normally the roughing and the finish.
The setting of fixtures and chrome plated nipples and exposed shut off valves normally came on the “finish” part of the contract.
The bath tub and shower bases normally are part of the roughing part of the contract.