"Piping" means an impermeable hollow cylinder or tubular conduit that conveys or transports liquids or vapors, or that is used for venting, filling, or removing liquids or vapors from a tank. The term includes pipe.
N.H. Admin. Code § Env-Or 402.45
(See Revision Note at chapter heading for Env-Or 400) #10393, eff 9-1-13