"Plumbing" means "plumbing" as defined in RSA 153:27, XIV, namely, "the practice, materials, and fixtures used in the installing, maintenance, extension, and alteration of all piping, fixtures, plumbing appliances, and plumbing appurtenances within or adjacent to any structure, in connection with sanitary drainage or storm drainage facilities; venting systems; and public or private water systems." For the purposes of these rules, "the term "plumbing" shall not apply beyond the first fitting beyond the foundation wall of the building or 5 feet of pipe from the building."
N.H. Admin. Code § Saf-Mec 102.20