What is prohibited on water and drainage lines?

Saddle valves are prohibited on water and drainage lines because they are considered to be a non-permanent means of connection and may pose significant risks for unauthorized water leaks or inadequate flow. Saddle valves, which clamp onto a pipe to create a water supply connection, can lead to damaging leaks if they are not installed properly or if they malfunction over time. Additionally, the use of saddle valves is associated with potential issues such as reduced water pressure and flow, as they do not provide a full-bore opening.

In contrast, ball valves and shut-off valves are often utilized in plumbing systems for their reliability and ability to provide a strong, leak-proof seal when closed. Expansion tanks are critical for managing thermal expansion in hot water systems, serving important functional roles in plumbing installations. The prohibition of saddle valves is thus rooted in ensuring the integrity and safety of plumbing systems, emphasizing the necessity for durable and dependable connections in water and drainage lines.