Question 66

The minimum required waste outlet for a laundry tub is 1 1/2 inches.

The appropriate size for the waste outlet of a laundry tub is 1 1/2 inches, ensuring adequate drainage for the water used in laundry operations.

A) 1 1/4 inches

Option A is incorrect because a 1 1/4 inch outlet is insufficient for the volume of water and other materials typically discharged from a laundry tub. Standards for plumbing fixtures dictate larger diameters to prevent clogs and ensure efficient drainage.

B) 1 1/2 inches

Option B is correct as it meets the minimum requirements established for laundry tub waste outlets. This size allows for proper drainage and prevents issues associated with slow drainage or backflow, making it the most suitable choice.

C) 2 inches

While a 2-inch outlet may provide greater drainage capacity, it exceeds the minimum requirement. Therefore, it is not the correct answer for the question focused on minimum standards, although it could be acceptable in certain applications.

D) 2 1/2 inches

Option D is also incorrect as it is larger than necessary for a laundry tub waste outlet. Similar to option C, it does not fulfill the requirement for the minimum size, thus making it unsuitable for this specific question.

Conclusion

The minimum required waste outlet for a laundry tub is 1 1/2 inches, as specified by plumbing standards to ensure effective drainage. Options A, C, and D do not meet the criteria for minimum requirements, thereby confirming that B is the definitive correct choice.