Replacement equipment is to meet the requirements of this Chapter, and in the case of irrigation pipeline check valves, will meet the following minimum requirements:
008.01 The valve body and all components will be constructed of corrosion resistant materials or otherwise coated or protected to prevent corrosion;008.02 The valve will contain a sealing mechanism designed to close prior to or at the moment water ceases to flow in the downstream direction. This mechanism will be either diaphragm-actuated by hydraulic line pressure, spring loaded or weight loaded to provide a watertight seal against reverse flow;008.03 The valve will be designed to meet the leakage tests specified in Underwriters Laboratory, Inc., Standard UL 312, Chapter 16, Leakage Test, page 11, dated May 22, 1984. (Appendix I).008.04 All moving components of the valve will be designed to prevent binding, distortion or misalignment during water flow; and008.05 The valve will be designed to allow for easy repair and maintenance, including removal from the pipeline if required to perform such work.195 Neb. Admin. Code, ch. 3, § 008
Adopted effective 6/24/2019Amended effective 12/10/2019Amended effective 4/19/2020