plumbing_6

Slope of Horizontal Drainage Pipes.
Plumbing codes generally require that horizontal pipes have a uniform slope sufficient to ensure a flow with a minimum velocity of 2 ft / s. The objective is to maintain a scouring action to prevent fouling of the pipes. Codes therefore often specify a minimum slope of ¼ in / ft for horizontal piping 3 ½ in in diameter or less and 1/8 or 1?4 in / ft for larger pipes. Because flow velocity increases with slope, greater slopes increase pipe-carrying capacity. In branch pipes, however, high velocities can cause siphonage of trap seals. Therefore, use of larger-size pipes is preferable to steeper slopes for attaining required capacity of branch pipes.

Piping for Indirect Wastes
? Certain wastes like those from food-handling, dishwashing (commercial), and sterile- materials machines should be discharged through an indirect waste pipe. This pipe is not directly connected with the building drainage pipes. Instead, it discharges waste liquids inSlope of Horizontal Drainage Pipes.
Plumbing codes generally require that horizontal pipes have a uniform slope sufficient to ensure a flow with a minimum velocity of 2 ft / s. The objective is to maintain a scouring action to prevent fouling of the pipes. Codes therefore often specify a minimum slope of ¼ in / ft for horizontal piping 3 ½ in in diameter or less and 1/8 or 1?4 in / ft for larger pipes. Because flow velocity increases with slope, greater slopes increase pipe-carrying capacity. In branch pipes, however, high velocities can cause siphonage of trap seals. Therefore, use of larger-size pipes is preferable to steeper slopes for attaining required capacity of branch pipes.

Piping for Indirect Wastes
? Certain wastes like those from food-handling, dishwashing (commercial), and sterile- materials machines should be discharged through an indirect waste pipe. This pipe is not directly connected with the building drainage pipes. Instead, it discharges waste liquids into a plumbing fixture or to a plumbing fixture or