| 摘要 |
PURPOSE: A length adjustable union for securing triple-airtightness is provided, which combines slope of a funnel-shaped washer and slope of a screwnut effectively and achieves effective airtightness. CONSTITUTION: A length adjustable union for securing triple-airtightness comprises a main body(10), screw thread(11), a round rubber ring(20), an assembling piece(30) of a tube type, a funnel-shaped washer(40), and a screwnut(50). The main body supplies water. The screw thread is installed in the end of the main body. The round groove is formed in the inner part of the main body surface. The rubber ring is inserted into a groove. The assembling piece is inserted into the main body. The washer is inserted into the assembling piece. The screwnut is inserted into the assembling piece and is combined with the screw thread of the main body.
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