Author(s): L. A. Siegerstetter; F. Valentin; A. Kleinschroth
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Abstract: Considering numerous occurrences in domestic plumbing systems in a South German city itseems legitimate to assume that for specific faucets-approved and on the market-1)mightnot be sufficient and 2)impossible to fulfil.In most of the cases the non-return valves whichare integrated into the water meters as a precaution against back-siphonage into the mainsgot jammed in their seats and the normal head of approximately 6 bar could not free themagain.Thus,the respective building was disconnected from the water supply.In extremecases the valves,usually made of plastics,burst into splinters and blocked taps or householdmachinery.
Year: 1991