When designing drain piping systems, it is essential to ensure that the pipes have enough slope to allow gravity to effectively carry waste away.
The appropriate slope for such systems is crucial because too little slope might cause the liquid to drain too slowly, leading to blockages, while too much slope can result in the water draining away too quickly, leaving solids behind.
In residential buildings, a commonly recommended slope rate is between [tex]$1 / 4$[/tex] and [tex]$1 / 2$[/tex] inch per foot. This range provides a balance that ensures efficient drainage while preventing the buildup of solids within the pipe.
Therefore, the proper slope for horizontal runs in drain piping systems should be within the range of [tex]$1 / 4$[/tex] to [tex]$1 / 2$[/tex] inch(es) per foot.
The correct answer is:
B) [tex]$1 / 4$[/tex] to [tex]$1 / 2$[/tex]
