The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
New Handy Site On Plumbing
Materials. All main and branch soil, waste, vent, and back vent pipes shall be made of cast iron coated with tar or asphaltum, galvanized wrought iron or steel pipe, or lead, brass, or cooper.
Minimum Size of Vent Stack. Where not more than two water closets are installed below the first floor and serve as the only closets in the building, the vent pipe shall not be less than two inches. In determining the size of the vent pipe, allow in addition to the closet, one bath, one basin, and one sink or other similar fixture. The size of the vent and waste pipes for basins, sinks, baths, or other similar fixtures when they serve as the only fixtures in a building shall be governed by the provisions of Chart A.
Four Inch Stack May Be Decreased. A closet may be installed on a four inch soil pipe rising from house drain to first and second floors, and may be vented with a two inch vent pipe, provided the premises where such closet is to be installed has a four inch soil pipe stack of undiminished size extending through the roof.
In garages, barns, etc , a closet may be installed on the first or ground floor and may be vented with a two inch pipe.
Roof Extensions. All soil and waste pipes receiving the discharge of any fixtures shall be extended the full calibre above the roof, except as mentioned under heading "FOUR INCH STACK MAY BE DECREASED," and as shown on sketch No. 5. In no case shall a vent pipe through the roof be less than four inches in diameter. The roof terminals of such vent pipes must extend at least three feet above any door, window, scuttle or air shaft or any other openings used for ventilation when located at a distance less than twelve feet from such terminals. See sketches No. 25 and No. 27. Change in diameters shall be made by long increasers at least one foot below roof.
Protection from Frost. All drain, soil, waste, or vent, and supply pipes shall be as direct as possible, properly protected from frost, and when possible arranged so as to be readily accessible for inspection and repairs.
Branch Soil and Waste Extensions. Any vertical or any horizontal branch running vertically, horizontally, or both, more than thirty feet from the soil line, shall be continued full size to a point above the roof in the same manner as required for main soil pipes or may be returned to main vent pipe full size. (See sketch No. 9.)
Traps, Distance from Vents. The back vent of any fixture trap shall be as close to the trap as practicable, consistent with its location and effectiveness.
