Yes. 110 drainpipe should be kept at a distance of 15 centimeters from the wall. 110 drainpipe refers to the outer diameter of the pipe 11 cm drainpipe, the mouth of this pipe will be larger, so generally can not be kept too close to the distance between the wall, otherwise in the process of installation need to destroy the wall. 110 drainpipe to the septic tank of five meters, the difference between the fall of 10 centimeters will be blocked. The drop is not less than 0.4m distance. In the sewage cross-pipe on the cleanout, should be set in the floor or floor level with the ground.