No water service connection to any premises
shall be installed or maintained by the water district unless the
water supply is protected as required by state regulations and this
Part 1.
Service of water to any premises may be discontinued
by the water district if a backflow prevention device required by
this Part 1 is not installed, tested and maintained; if any defect
is found in an installed backflow prevention device; if it is found
that a backflow prevention device has been removed or bypassed; or
if unprotected cross-connections exist on the premises, and service
will not be restored until such conditions or defects are corrected.