Soil and waste stacks should be firmly supported at their base by a brick pier or iron pipe rest placed directly under the stack. If the house drain is suspended from the ceiling beams, a strong iron hanger should be placed on the drain close to the stack and when possible to place two hangers, one on each side of the stack, it should be done. Besides supporting stacks at their base they should also be supported at each floor of the building by heavy iron hangers securely fastened to the side walls or floor beams. Pipe hooks may be used in small frame buildings, but should not be used in buildings over three stories in height.

Material For Stacks

Cast-iron hub-and-spigot pipe is generally used for soil waste and vent stacks in buildings that do not exceed 65 feet in height. In buildings of greater height, also in small buildings where the extra cost of installation need not be considered, wrought-iron drainage systems should be installed. The recommending features of this system of piping are, greater and more uniform strength of the pipe, less number of joints, greater strength and permanence of the joints, greater range in the size of pipes and fittings and greater flexibility of the pipes and of the system as a whole.

Wrought-iron drainage systems differ from other drainage systems only in the materials of which they are constructed and the method of working the materials.