Jay R. Smith Mfg. Co.® offers a full line of trench drain products covering a broad scope of manufacturing, processing, commercial, industrial and residential applications. The Enviro-Flo® Trench Drain Series, Figure Numbers 9930 and 9931, is made from 100% polypropylene, making it light weight, durable and easy to install. The Enviro-Flo® system can consist of 15 sloped and 15 neutral channels for any configuration. The Smith/ACO Trench Drain Series, Figure Numbers 9810 through 9860, is made from precast polymer concrete and fiberglass. The Smith/ACO system is sloped with a radiused bottom. The smooth, uniform interior of these channels offers maximum hydraulic performance. Jay R. Smith Mfg. Co.® Drainage Systems includes a wide variety of grate types and materials to meet all installation requirements.
In a siphonic roof drainage system, Smith's specially engineered and tested roof drain baffle allows and sustains negative atmospheric pressure in the connected piping and inhibits the admission of air into the piping system hence sustaining full-bore flow and higher flow volumes and velocities. The hydraulic balance in a siphonic roof drainage system is achieved by an engineer employing hydraulic calculations to ensure that the piping system fills up automatically in cases of moderate to heavy precipitation. The resulting full-bore or siphonic action allows for the installation of horizontal, i.e., level, drainage manifold piping serving multiple roof drains. Siphonic roof drainage systems are powered by and discharge to grade by means of a vertical stack into the point of discharge through the influence of gravity making them true gravity systems.