Dug wells should be Iined with _____________. ____________, or ___________.
Any flow of nonpotable water or other Iiquid into a potable water system is termed
Backflow caused by negative pressure (partial vacuum) in a water system is
The operation of a siphon is based upon three physical factors:
Does the illustration below depict a direct or indirect cross connection?
The only positive protection against backsiphonage in a plumbing system is a
The most common cause of indirect cross connection is the _________________.
Vacuum breakers provide protection only against ____________________.
When a vacuum breaker must be used, ___________________ the type is
preferred. This type must be located on the ____________________ side of the