| 摘要 |
Mounted in the housing (10) of a back-syphonage preventer (1) is an exchangeable insert (3) which exhibits inflow openings (321) and air-inlet openings and a hose diaphragm (35) which alternately releases the inflow openings (321) and covers the air-inlet openings or covers the inflow openings (321) and releases the air-inlet openings. The housing (10) exhibits, transversely to the through-flow direction, an opening (14) whose dimensions are fixed such that the insert (3) can be exchanged through said opening (14). <IMAGE>
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