PRESSURE TANKS FOR WATER-SUPPLY WELLS

Subpart 1. Venting. A pressure relief or air release valve on a pressure tank that contains subterranean gas and is located in a building must be vented to the outside. Subp. 2. Buried tanks. A buried or partially buried pressure tank installed on a water-supply well must: A. be identified with the manufacturer's name, a serial number, the allowable working pressure, and the year fabricated; B. have an interior coating that complies with ANSI/NSF Standard 61-2003e if the tank has an interior coating in contact with water; C. have a minimum one-fourth inch wall thickness for a steel pitless adapter tank attached directly to the well casing; D. have all connections to the pressure tank welded or threaded; and E. be installed above the water table.