| 摘要 |
An upstanding tubular strainer is provided including inlet and outlet end portions delimited by a longitudinally central radially outwardly projecting diametrically enlarged shoulder. The inlet end portion is provided with elongated, longitudinally extending and circumferentially spaced inlet slots which taper in width inwardly toward the interior of the tubular member and the outlet end portion includes tandem circumferentially extending seal structure spaced longitudinally therealong. The outlet end portion is adapted to be telescoped upwardly into the inlet end of a riser pipe or the like opening upwardly outwardly from the upper wall portion of a horizontal main supply pipe.
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