The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
Plumbing Repairs And Utilities
d. Avoid cutting or notching structural members, and do not pass pipes through structural members unless absolutely necessary. If cutting or notching is necessary, provide adequate reinforcement.
e. Do not change direction of drainage piping more than 900 in a single turn. Short-turn fittings may be used if change of flow is from horizontal to vertical; in all other changes of direction, use Y-connections and long-sweep bends.
f. Provide pipe clean-outs at convenient places so lines can be cleared readily. Locate clean-outs at each change of direction and at or near the foot of each vertical waste or soil stack. Install an accessible clean-out on building drains to permit cleaning the connection to the outside sewer main.
g. Install floor drains only where actually needed and where frequent use of drains protects the drain trap seal. Flush existing floor drains at regular intervals to keep sewer gas from escaping through drain trap.
h. Protect every trap seal with a stack vent, back vent, relief vent, circuit or loop vent, or other method to prevent siphonage of the trap. Venting the drainage system properly is an extremely important safeguard to the health of the building's occupants.
i. Extend soil stacks and vent stacks to the open air outside the building These vents may be connected inside the building with a single extension through the roof.
j. When it is necessary to suspend horizontal piping from floors or ceilings, space pipe hangers not more than 10 feet on centers.
k. Install horizontal piping with enough slope to drain the system. Recommended slopes for various pipe sizes are —
| Pipe diameter Under 2 inches 2 to 6 inches Over 6 inches | Minimum slopeper foot % inch % inch %0 inch |
l. When piping is installed under walls, take precautions to allow freedom of movement between pipe and wall. Wrapping the pipe with tarpaper or coating it with asphaltum is a recommended method In heavy masonry construction, use a pipe sleeve to provide for adequate movement.
