Cleanouts are used instead of manholes ina.Vacuum Sewer Systemsb.Shallow Sewer Systemsc.Pressure Sewer Systemsd.Small Bore Sewer Systems

Cleanouts are typically used instead of manholes in Small Bore Sewer Systems.

Step 1: Understanding the question The question is asking in which type of sewer system are cleanouts used instead of manholes.

Step 2: Understanding the options a. Vacuum Sewer Systems: These systems use differential atmospheric pressure to move the sewage. b. Shallow Sewer Systems: These are sewer systems that are not very deep underground. c. Pressure Sewer Systems: These systems use a pump or pressure to move the sewage. d. Small Bore Sewer Systems: These are smaller sewer systems, typically used in less populated areas or for specific small-scale applications.

Step 3: Answering the question Cleanouts are typically used in Small Bore Sewer Systems. This is because these systems are smaller and less complex, and therefore do not require the larger and more complex manhole structures. Cleanouts provide a simpler and more cost-effective solution for access and maintenance in these types of systems.