(1) Owners have the responsibility to protect public water systems from contamination due to cross-connections.
(2) Cross-connections which can be eliminated shall be eliminated. The owner shall work cooperatively with local authorities to eliminate or control potential cross-connections in a manner acceptable to the department.
(3) When an existing cross-connection poses a potential health or system hazard, the owner shall shut off water service to the premises until the cross-connection has been eliminated or controlled by the installation of a proper backflow prevention assembly.
(4) Backflow prevention devices shall be approved by the department and tested in a manner prescribed by the department in WAC 246-290-490
[Statutory Authority: RCW 43.20.050. 94-14-002, § 246-291-270, filed 6/22/94, effective 7/23/94.]