| 摘要 |
A waste water strainer has a horizontal flange having a center opening. A hollow barrel is secured to and extends downwardly from the flange and has a center opening concentrically located with respect to the center opening in the flange. A hollow strainer extension is threadably secured to a lower end of the barrel. A sleeve with an internal concave surface is slidably and removably mounted within the upper end of the strainer extension. A circular disk valve having an annular outer surface symmetrical with the concave surface of the sleeve is pivotally mounted on the concave surface of the sleeve. The sleeve is supported at the lower end of the hollow strainer and extends upwardly to engagement with a lower surface of the flange. The flange and the barrel have a chrome-like finished surface, and the strainer extension has a different finish surface.
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