N.H. Code Admin. R. Mec 102.18
“Master plumber” means “master plumber” as defined in RSA 153:27, XII, namely “any person, firm, corporation, or limited liability company that, as a business, hires or employs a person or persons to do plumbing work, or, without hiring any person, does that work as a principal business or as auxiliary to a principal business for its own account.”
Source. #10798, eff 3-18-15; ss by #13483, eff 1-9-23 (formerly Saf-Mec 102.13) (see Revision Note at chapter heading for Mec 100); #14408, eff 10-17-25