Page 196 - ServSafe E-Book

Water and Plumbing

Backflow:

 Reverse flow of contaminants through a cross-

connection into the potable water supply

Backflow can be the result of:

 Pressure pushing contaminants back into the

water supply

 A vacuum in the plumbing system created

when high water use in one area of the

operation sucks contaminants back into the

water supply (backsiphonage)

9-18