Area Drain

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Area Drain

What is Area Drain?

Area Drain, A surface drain that collects and channels stormwater away from paved or landscaped areas.

Description

An area drain is a grated inlet installed in parking lots, patios, or landscaped zones to capture surface runoff and connect it to storm piping. Constructed from cast iron, HDPE, or PVC with removable grates, area drains prevent ponding and reduce slip hazards. Proper sizing takes into account rainfall intensity, tributary area, and grate open area. Clean‑outs and sump depths allow debris removal to maintain flow capacity.

FAQs

  • Where are area drains used?

    Driveways, pool decks, courtyards, and low points in parking lots.

  • What materials are area drain bodies made from?

    Cast iron, polypropylene, PVC, or HDPE.

  • How is flow capacity determined?

    Based on the grate opening size and expected rainfall in inches per hour.

  • Do area drains need traps?

    Exterior drains typically do not have traps; however, interior trench drains may require them.

  • Who installs area drains?

    Sitework or plumbing contractors during the underground utility phase.

  • How often should drains be cleaned?

    At least annually, or after heavy storms, to remove sediment and leaves.

  • Does the code require area drains?

    Drainage codes mandate positive drainage; specific outlet types vary by locale.

Fun Fact

Fun Fact: Some modern area drains incorporate built‑in sensors that alert facility managers when a blockage is detected.

CSI Code

33 46 00

NAHB Code

270