37. A MINIMUM of how many total cleanouts are REQUIRED in a 4-inch building sewer with a straight run of 550 feet in length with a cleanout installed at each end
Answer: D
Eight total cleanouts are required in a 4-inch building sewer with a straight run of 550 feet.
According to plumbing codes, for a straight run of 550 feet in a 4-inch building sewer, a minimum of eight cleanouts is necessary. This includes the cleanouts installed at each end of the sewer line, fulfilling the required spacing for access.
A) Nine
While nine cleanouts would exceed the minimum requirement, it is not necessary for a straight run of this length. The code specifies that eight is the maximum needed, thus making this option incorrect.
B) Six
Six cleanouts are insufficient for a 550-foot run of a 4-inch sewer line. The minimum spacing requirements dictate that more access points are needed to adequately maintain the system, making this option incorrect.
C) Seven
Seven cleanouts do not meet the necessary code requirements for the specified length of the sewer line. The plumbing codes require eight cleanouts for proper maintenance and access, thereby rendering this option incorrect.
D) Eight
Eight cleanouts are the minimum required for a 550-foot long, 4-inch building sewer. This meets the plumbing codes for cleanout spacing, ensuring proper access for maintenance and cleaning.
Conclusion
The requirement for eight cleanouts is aligned with plumbing codes that dictate access needs for sewer lines of this length. Options A, B, and C do not meet the minimum requirements established, which confirms that D is the definitive correct answer.