Minnesota Administrative Rules

4715.1570 METHOD OF PROVIDING AN AIR GAP.

The air gap between the indirect waste pipe and the building drainage system must be at least twice the effective diameter of the drain served and must be provided by one of the following methods:

A.

To a receptor. Extend an indirect waste pipe to an open, accessible, individual waste sink, floor drain, or other suitable fixture which is properly trapped and vented.

The indirect waste pipe must terminate a sufficient distance above the flood level rim of the receiving fixture to provide the required air gap.

B.

To the inlet side of a trap. Provide an air gap in the drain ahead of the connection to the inlet side of the trap, which receives the waste from the indirect waste.

Statutory Authority:

MS s 16B.59 to 16B.73; 326.37 to 326.45; 326B.101 to 326B.151; 326B.43 to 326B.49

History:

11 SR 1405; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4; L 2008 c 337 s 64

Published Electronically:

May 14, 2012