Private interceptor main sewers 6 inches or larger must have a manhole at the most upstream point of the private main, and what spacing and angle requirements?

• A. At every 90-degree change and every 200 feet
• B. Only at the beginning and end of the main
• C. At every branch connection, not more than 100 feet apart
• D. At every 45-degree change in direction and at intervals not more than 400 feet

Answer: (D)