Z131S

Siphonic Overflow Roof Drain W/Dura-Coated Cast Iron Body + Air Baffle, Membrane Flashing Clamp and Deck Plate

Gain more usable building space and save on material costs with this siphonic overflow roof drain. Siphonic action keeps air out of pipes by inducing a negative pressure for quick, efficient drainage. Utilization of smaller diameter, non-sloping piping systems as compared to traditional gravity systems, will take up less space and require fewer downspouts. Drain is crafted with a Dura-Coated cast iron drain body and combination membrane flashing clamp/external overflow water dam. Includes a Dura-Coated cast iron air baffle and deck plate.

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Drainage Design Form
  • Gain more useable building space with non-sloped, horizontal piping that takes up less space running below the roof as compared to a gravity roof drain system
  • Drive building costs down with fewer drains, fewer downspouts, and smaller pipe diameters without sacrificing system performance.
  • Higher flow velocities make system self cleaning without the need for additional cleanouts
  • System design can help earn LEED credits for materials, innovation, sustainable sites, water efficiency, regional priority and atmosphere
  • Design allows for flexible vertical stack placement based on architectural needs
  • Near silent operation when siphonic roof drain is under full bore flow condition
  • Integrated deck plate cuts roof drain installation time in half as compared to traditional installation methods
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