The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California

How To Design And Install Plumbing

Materials Used. The materials used for storm drain construction are identical with those of house sewers and house drains. Vitrified clay pipe and fittings with cemented joints are used for this purpose. It may be well for the reader to refer to Chapters III and IV, which describe materials used in drainage systems.

INSTALLATION OF THE STORM DRAIN

Inside Storm Drain. Storm drains usually are classified as inside, outside, and overhead drains. The inside storm drain is located under the basement floor within the walls of the building, see Fig. 82. This type of drain is used in buildings located in congested business areas.

The plumber must take care to plan the installation of the inside storm drain so it will not interfere with the sanitary drain of the system in service. The greatest difficulty encountered is in crossing over the main runs of the sanitary drain with branches of the storm drain.

Fig. 83 illustrates the proper procedure where this problem arises.

Outside Storm Drain. The outside storm drain is located around the outer foundation wall of the building and is placed below the frost line of the ground, as shown in Fig. 84, a depth of 4 feet being considered adequate.

This type of drain is advisable on buildings where an ample amount of ground space between buildings is available. It should be laid on a substantial bed of earth and may be constructed of vitrified clay or cast-iron pipe.

Overhead Storm Drain. The overhead storm drain is suspended from the basement ceiling by substantial hangers, placed at close intervals, and generally is adapted to buildings where the public storm sewer is not sufficiently deep in the street to permit gravity drainage of the underfloor inside drain.