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.
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.
248 CMR, § 5.03