Question

Name two locations to install a check valve in a house with combination sewers to reduce

the risk of backup into the basement.
a. Floor drains and main drain line
b. Basement sink and toilets
c. Hose bibs and pool self-fill mechanisms
d. None of the above

Answer 1

To prevent sewage backup in homes with combination sewers, check valves should be installed at floor drains and the main drain line to allow water flow in only one direction. Therefore , the correct answer options is d)

Step-by-step explanation:

To reduce the risk of backup into a basement in a house with combination sewers, two locations for installing a check valve are particularly effective: floor drains and the main drain line. Check valves are devices that allow water to flow in one direction but close to prevent flow in the opposite direction, thus preventing sewage from flowing back into a home.

Installing check valves at these points can prevent a backflow of sewage into lower areas of the house during heavy rainfalls or sewer system overflows. In contrast, items such as basement sinks and toilets, hose bibs, and pool self-fill mechanisms are not typically associated with the direct prevention of sewer backups.