Question 66

1 1/2 inches

The minimum required waste outlet for a laundry tub is 1 1/2 inches, which is necessary to ensure proper drainage and prevent clogs.

A) 1 1/4 inches

Option A is incorrect because a 1 1/4 inch waste outlet does not meet the minimum standards required for a laundry tub. This size may lead to inadequate drainage, increasing the risk of backups and plumbing issues.

B) 1 1/2 inches

Option B is correct as it specifies the minimum diameter required for the waste outlet of a laundry tub. This size is designed to handle the volume of water typically discharged by a laundry tub, ensuring efficient drainage.

C) 2 inches

Option C is incorrect because, while a 2 inch waste outlet could provide sufficient drainage, it exceeds the minimum requirement. Using a larger size than necessary can result in unnecessary costs and may not align with local plumbing codes for laundry tub installations.

D) 2 1/2 inches

Option D is also incorrect, as a 2 1/2 inch waste outlet is larger than what is required. Similar to Option C, while it may function adequately, it is not the minimum specification and may lead to excessive material use and installation costs.

Conclusion

The correct answer, 1 1/2 inches, is the minimum required size for a laundry tub waste outlet, ensuring optimal drainage performance. Other options either fall below this requirement, which can lead to plumbing issues, or exceed it unnecessarily, leading to inefficiencies in both material use and cost.