3. Fixture drain.

Question 0

2. Shower waste outlet.

Answer 0

Waste outlet serving shower shall be at least 2 inches, 0.25 inches, 3 inches in diameter and for other than waste outlet in bathtubs, shall have removable strainers not less than 3 inches in diameter with strainer opening not less than 0.25 inches in minimum dimension.

Question 1

1. Drainage fixture units for fixture drain and traps.
1-1/4" - ? FU.
1-1/2" - ? FU.
2" - ? FU.
2-1/2" - ? FU.
3" - ? FU.
4" - ? FU.

Answer 1

1-1/4" - 1 FU.
1-1/2" - 2 FU.
2" - 3 FU.
2-1/2" - 4 FU.
3" - 5 FU.
4" - 6 FU.

Question 2

3. Automatic clothes washer (domestic).

Answer 2

1. The minimum required size of a trap and fixture drain for a clothes washer is 2 inches.
2. Where connection is made to a fixture branch, horizontal branch drain or drainage stack,the minimum required size is 3 inches in diameter. (This is because the discharge rate for an automatic clothes washer has increased to 21 gallons per minute.
3. Where a clothe s washer discharges to a laundry sink there is no problem with the high-speed pump. The capacity of the laundry sink allows a slower discharge flow rate to the fixture drain.
4. A clothes washer must discharge to the drainage system through an air break.