Mechanical · M-W4DEJ

Rooftop Unit Condensate Drain Trap Detail

Materials

Elements

Roofs Waterproofing / Flashing Insulation Drainage

About this detail

The condensate drain line extends from the rooftop unit drain pan, pitching down toward the drain with a cleanout installed near the horizontal run. The pipe penetrates through the roof assembly, which consists of a roof membrane, flashing, counter flashing, and existing insulation with replacement insulation at the penetration. Below the roof deck, the line drops into a P-trap with a six-inch minimum depth before continuing to the plumbing connection.

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