248 C.M.R. 5.03
Authority Having Jurisdiction (AHJ). Inspector as defined in 248 CMR 3.02: Definitions, the Board, or such other authority approved by the Board.
Listed equipment must meet product acceptance requirements in 248 CMR 3.00: General Provisions Governing the Conduct of Plumbing and Gas Fitting Work Performed in the Commonwealth.
including pipe dope and pipe thread sealing tape (e.g. Teflon).
3.3.112 Downstream. Outlet or discharge side of equipment, a fixture, an appurtenance, or other device from which gas, liquid, or other substances exit. This term may also be utilized to describe the direction in which a gas, liquid, or other substance is flowing.
3.3.113 Upstream. Inlet or supply side of equipment, a fixture, an appurtenance, or other device into which gas, liquid, or other substances flow. This term may also be utilized to describe the direction from which a gas, liquid, or other substance has originated.