Minnesota Administrative Rules

4715.1940 POTABLE WATER CONNECTIONS TO HEATING OR COOLING SYSTEMS.

Potable water connections to boiler feed water systems, cooling systems, or other liquid systems, in which water conditioning chemicals may be introduced shall be made through an air gap or provided with an approved backflow preventer located in the potable water line before the point where such chemicals may be introduced. Where a system is filled with an antifreeze or toxic solution a permanent tag will be placed in plain view stating "Caution, this system contains antifreeze/toxic solution."

Statutory Authority:

MS s 16B.61; 326.37 to 326.45; 326B.106; 326B.43 to 326B.49

History:

9 SR 1557; 15 SR 76; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4

Published Electronically:

May 14, 2012