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Master license: 1  One year of practical experience as a licensed Virginia journeyman; or. 2  Ten years of practical experience in the trade, verified by an affidavit from those who observed the candidateâs work in the trade.
3 Answers 3. Of course they can as long as you have proper drainage angle and double venting and traps. If this is an installation of a new fixture, you need a permit and a master plumber to sign for the permit. Get a plumber and do it right. Just asking the question tells me you don't know what to do and could get into trouble.