§ 121-7. Vents and pipes.

Latest version.

A fresh-air inlet pipe shall be connected to the house drain just inside of the house trap and extended to the outer air terminating with an open end and at least 18 inches above the finished grade at the most available point. The fresh-air inlet pipe shall be at least 1/2 the diameter of the house drain, but in no case shall the fresh-air inlet pipe be less than four inches in diameter. No vent caps shall be permitted, and the fresh-air inlet pipe shall terminate with a return bend or a fresh air plate.

                    
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