The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
How To Design And Install Plumbing
Soil, Waste And Vent Pipe Principles
In the preceding chapters soil, waste, and vent pipe installation practices were discussed as separate units of the drainage system. It may be difficult for the reader to correlate the several units of a complete plumbing system, because of the many complex problems which arise.
The drainage system, as a whole, consists of many forms of waste and vent correlated into one specific unit. Problems in graduating the sizes of the waste and vent become more difficult, and many important details are liable to be overlooked, unless the reader is given an opportunity to become familiar with the complete plumbing installation and see how to apply the information which has been presented.
It would be impossible to illustrate and describe every combination of fixtures which could be installed, and even though an attempt were made to do so the addition or rearrangement of one or more fixtures would offer new problems.
For the convenience of the reader ten common plumbing layouts, which serve as a basis of all installations, are included in this chapter. Each one is discussed in a brief but general manner that should make the application of the principles and practices of soil, waste, and vent more easily understood.
Fig. 175 represents a drain, soil waste-, and vent pipe arrangement permissible in a one-story residence. The installation consists of a water closet, lavatory, sink, and bathtub on the first floor, and a laundry tub in the basement.
The house drain may be constructed of 4-inch cast-iron pipe or 6-inch vitrified clay pipe. It is provided with a cleanout, extended above the basement floor immediately inside the foundation wall. A 4-inch floor drain is located in the laundry and connected to the house drain with a 4-inch cast-iron or vitrified clay branch. The branch into which the soil pipe terminates must be of 4-inch cast iron or 6-inch clay pipe, and it must be extended full size above the floor.
The soil pipe is constructed of 3-inch or 4-inch cast iron, and must be provided with a cleanout at its base. If 3-inch pipe is used, it must be increased to 4-inch as it passes through the roof.
The bathroom waste piping is a very simple installation. The closet bend is calked into the side opening of a sanitary tee. The bath waste, as the illustration indicates, is constructed of l1/2-inch pipe and is provided with a drum trap. The lavatory waste discharges directly into a tapped tee, placed above the closet bend, and is built of l1/4-inch diameter pipe.
