My handy hubby just finished a new bathroom in the basement. Rough plumbing had been installed when the house was built 2 years ago. Turning on the tub faucet releases bright orange water for a full second or so, then it clears completely. Have tried running the water for 10-15 minutes, but still after the faucet has been turned off for a time, the orange always returns. The longer the faucet stays off, the brighter the orange--like orange soda after 2 days of non-use. Plumbing inspector comes tomorrow for final plumbing inspection...what is the cause, and are we going to have to rip out the tub surround or anything nasty like that to fix it? (Hubby has no clue I'm asking. He's leaning toward ignoring the problem. Help!)