706.3 Installation of Fittings
Fittings shall be installed to guide sewage and waste in the direction of flow. Change in direction shall be made by fittings installed in accordance with Table 706.3. Change in direction by combination fittings, side inlets or increasers shall be installed in accordance with Table 706.3 based on the pattern of flow created by the fitting. Double sanitary tee patterns shall not receive the discharge of back-to-back water closets and fixtures or appliances with pumping action discharge.
Exception: Back-to-back water closet connections to double sanitary tees shall be permitted where the horizontal developed length between the outlet of the water closet and the connection to the double sanitary tee pattern is 18 inches (457 mm) or greater.
FITTINGS FOR CHANGE IN DIRECTION
|TYPE OF FITTING
|CHANGE IN DIRECTION|
and eighth bend
For SI: 1 inch = 25.4 mm.
- The fittings shall only be permitted for a 2-inch or smaller fixture drain.Deleted
- Three inches or larger.Deleted
- For a limitation on double sanitary tees, see Section 706.3.
Fixture crosses will not be required to meet the exception of IPC Section 706.3.