Minnesota Administrative Rules

4725.5150 WATER-SUPPLY WELL SUCTION LINE.

Subpart 1.

Construction.

As specified in part 4715.0510, a suction line for a water-supply well must be constructed of:

A.

copper;

B.

galvanized iron or steel;

C.

cast iron; or

D.

plastic pipe.

For well water irrigation systems, aluminum pipe may also be used.

Subp. 2.

Extensions.

A suction line extending outside the well casing must be protected by being:

A.

fully exposed in a building as specified in part 4725.2175;

B.

fully exposed above the established ground surface; or

C.

installed within an outer, concentric pipe with the annular space between the pipes filled with water from the system and maintained at system pressure.

Subp. 3.

Exception.

An unprotected suction line may be installed below the established ground surface for an irrigation well if the well is:

A.

located in an agricultural field;

B.

installed in an unconfined aquifer in unconsolidated material; and

C.

used for a manifold collection system under negative pressure.

Statutory Authority:

MS s 103I.101; 103I.221; 103I.301; 103I.621; 144.05; 144.12; 144.383; 157.04; 157.08; 157.09; 157.13

History:

17 SR 2773; 33 SR 211

Published Electronically:

September 2, 2008