| 摘要 |
A method and apparatus for freeing an obstruction from a plumbing fixture using a flexible diaphragm. The diaphragm is constructed of flexible membrane and is adhered to a top ring of the plumbing fixture. The diaphragm is operated by allowing air into the space between the diaphragm and the wastewater through an air valve and then pushing and pulling the diaphragm to create forces of air that dislodge the obstruction.
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