| 摘要 |
The prsent invention discloses a service joint for domestic discharges connection which comprises a cylindrical rubber piece having exactly the same diameter as that of the tube to be used, for the connection of domestic discharges to the main pipework of sanitary or pluvial drainage systems, said piece being used in any type or mark of tube, and resistant to those chemicals found in domestic and industrial drainages, thereby being a lasting material. The cylindrical rubber piece is inserted in the main tube, by perforating said main tube using a drill so that an opening is formed having the same diameter as the outer diameter of the tube to be inserted. diameter of the tube to be inserted.
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