| 摘要 |
A fixture for attachment to water lines during installation of plumbing in a building under construction. A closed chamber has a base flange for attachment to a suitable support and a water inlet tube near the base. An outlet tube extends in the chamber from a position near the base and through the other end where it is provided with a valve. The tubes are so arranged in the chamber that the fixture can be installed in either a horizontal or a vertical position and yet trap a body of air in the chamber when supplied with water.
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