Flow Control Roof Drain Design

If you have heavy runoff from roof downspouts and neighboring properties redirecting or capturing runoff can provide better control.

Flow control roof drain design.

Or 12 drains required. The control flo weir is linear functioning with integral membrane flashing clamp gravel guard and poly dome. Smith raintrol metered flow rate roof drains are designed to provide this control. The flow through the roof drain is very efficient directing the water into the drain.

The zurn z105 15 diameter control flo roof drain for dead level roof construction has a dura coated cast iron body. Sizing quantity and location of raintrol roof drains are separate and distinct procedures from those for regular roof drains. Z105 control flo roof drain. Roof drains from large area roof drains and siphonic roof drainage systems to green roof drains balcony drains and roof drain accessories we cover the gamut of roof drainage needs for addressing varying rainfall rates and types of sites.

And 4 area handled by each drain. The flowcontrol assembly is secured to the drain body sump area by the clamping ring. When sizing roof drains the limiting factor for the amount of water each drain will carry away is the size of leader therefore increasing. The end result is roof drains 6 in.

Take the roof s total square footage and divide by the total square footage handled by one drain. 1 rate of precipitation. 50 000 4 400 11 36. These systems are sized for maximum rainfall for the geographical area.

Standard primary roof drains are designed to drain storm water as quickly as possible. The result is the number of drains needed. Zurn makes it easy to size roof drains. The following approaches to redirect and capture runoff can be used to control heavy runoff causing prolonged wet areas or yard erosion.

All roof openings whether they are at the roof drain or at the vent stack should be protected from vandalism. Control flo drains the roof at a controlled flow rate at predetermined levels. 2 total area of roof. Or smaller in size have the ability to flow more water to the piping than the piping can handle using 33 for the vertical and full flow for the horizontal.

Our exclusive dual functional structural deck flange and combination roof drains streamline specifications saving installation time and labor. Control flo is a method to remove rain water from flat or sloped roofs. 3 size of leader required. As with all building materials it is the roofing contractor s responsibility to review product use with a design professional to confirm safety compatibility and acceptance with the roof cover manufacturer as well as local building codes.