La. Admin. Code tit. 51 § XIV-311

Current through Register Vol. 50, No. 12, December 20, 2024

Section XIV-311 - Fittings

A. Change in Direction. The following applies to the use of fittings in changes of direction of drainage piping.

1. Changes in direction in drainage piping shall be made by the appropriate use of 45° (0.785 rad) wyes, long-or-short-sweep quarter bends, one-sixth, one-eighth, or one-sixteenth bends, or by a combination of these or equivalent fittings. Single and double sanitary tees and quarter bends may be used in drainage lines only where the direction of flow is from the horizontal to the vertical. A sanitary tee shall not be used on a horizontal drainage line as a takeoff fitting for a vent.

2. Changes in direction in Schedule 40 DWV-PVC and ABS drainage piping shall be made by the appropriate use of 45° (0.785 rad) wyes, quarter bends or long sweep quarter bends, one-sixth, one-eighth, or one-sixteenth bends, or by a combination of these or equivalent fittings. Single and double sanitary tees and quarter bends may be used in drainage lines only where the direction of flow is from the horizontal to the vertical. A sanitary tee shall not be used on a horizontal drainage line as a takeoff fitting for a vent.

B. Short Sweeps. Short sweeps not less than 3-inch diameter may be used in soil and waste lines where the change in direction of flow is from the horizontal to the vertical and may be used for making necessary offsets between the ceiling and the next floor above.

C. Prohibited Fittings. A straight tee branch shall not be used as a drainage fitting. A saddle type fitting or running threads shall not be used in the drainage or vent system. Drainage or vent piping shall not be drilled or tapped unless approved by the plumbing official. A fitting having a hub in the direction opposite to flow shall not be used in the drainage system, unless the pipe is cut by either a saw or snap cutter, which will assure clean, smooth cuts of the pipe. Double sanitary tee pattern fittings shall not receive the discharge of fixtures or appliances with pumping action discharge.

D. Heel or Side Inlet Bend Prohibited. Heel or side inlet quarter bend fittings shall not be used in the drainage or vent system.

F. Obstruction to Flow. A fitting or connection which offers abnormal obstruction to flow shall not be permitted. See §715 of this code.

G. Increasers and Reducers. Where different sizes of pipes or pipes and fittings are to be connected, the proper size increasers or reducers or reducing fittings shall be used between the two sizes.

La. Admin. Code tit. 51, § XIV-311

Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2811 (November 2012).

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).