back siphonage


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back siphonage

[′bak ¦sī·fən·ij]
(civil engineering)
The flowing back of used, contaminated, or polluted water from a plumbing fixture or vessel into the pipe which feeds it; caused by reduced pressure in the pipe.

back siphonage

The flowing back of used, contaminated, or polluted water from a plumbing fixture or vessel into the pipe which feeds it; due to reduced pressure in the pipe.
References in periodicals archive ?
Such backflow often occurs in tandem with "back siphonage" - the flowing back of used, contaminated, or polluted from a plumbing fixture into a water supply due to negative pressure.
They feature water triple security to provide optimum protection against back pressure and back siphonage: two check valves and a discharge valve divide the unit into three chambers, each providing a separate pressure zone.
Most outbreaks involved private water supplies and were caused by direct fecal contamination, back siphonage from a nonpotable source into a potable system, or cross-connections between such systems.