Plumbing · P-B7DV8

Air Gap Fitting in Access Box Detail

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An in-wall access box fabricated of number 20 U.S. standard gauge steel with a plexiglass cover encloses a fixed air gap fitting with a one-inch inlet and two-inch outlet. A one-half-inch domestic water line feeds a shut-off valve, a union, and a trap primer valve, with a trap primer connection dropping down into a P-trap. A one-inch condensate drain from HVAC units connects to the air gap fitting. A two-inch waste line and one-and-one-half-inch vent connect downstream of the P-trap, and an access panel is provided for the valve and trap primer.

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