Cleanouts for building sewers should be installed on any turn that is more than how many degrees?

Cleanouts for building sewers should be installed on any turn that is more than how many degrees?

• A. 90°
• B. 120°
• C. 135°
• D. 150°

Answer: (C)

Access points are placed where a sewer line changes direction so a plumber can insert a snake and clear a blockage. When a turn is larger than 135 degrees, the bend becomes too tight for standard rodding tools to negotiate effectively, so a cleanout is needed at that location to provide direct access for cleaning. Turns of 135 degrees or less can usually be cleared through the existing run with the tool, so no extra cleanout is required there. That’s why the correct threshold is 135 degrees.

Access points are placed where a sewer line changes direction so a plumber can insert a snake and clear a blockage. When a turn is larger than 135 degrees, the bend becomes too tight for standard rodding tools to negotiate effectively, so a cleanout is needed at that location to provide direct access for cleaning. Turns of 135 degrees or less can usually be cleared through the existing run with the tool, so no extra cleanout is required there. That’s why the correct threshold is 135 degrees.