What potential issue can arise from improperly installed horizontal drains?

Improperly installed horizontal drains can lead to blockage and backup primarily due to several factors. When horizontal drainage systems are incorrectly pitched or do not adhere to recommended installation practices, it can create areas where waste and water can pool instead of flowing smoothly toward the sewage system. This pooling can cause solids to accumulate, leading to clogs and eventual backups in the plumbing system.

Additionally, horizontal drains require a certain slope to ensure gravitational flow, and without this slope, waste may not be able to move effectively through the pipes. Blockages can result not just from solid waste accumulation, but also from debris, grease, and other materials that may adhere to the pipe walls in these improperly pitched sections. This scenario emphasizes the importance of adhering to installation guidelines to maintain an effective drainage system and prevent such issues from developing.

While odor within fixtures, increased water pressure, and leakage at joints can be consequences of plumbing issues, they are more often associated with different types of installation errors or material failures rather than directly with the specific issues arising from horizontal drain installations.