| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent backflow of wastewater by molding a drainage chamber of a chamber main body having a connecting part on its both end parts, a branching part connected to this chamber main body at an inclination of 45 degrees and a cleanout and making a socket of an inflow port of the chamber main body higher than the chamber main body through a stepped part. SOLUTION: A drainage chamber 1 is molded of a chamber main body 2, a branching part 3 and a cleanout, and the branching part 3 is connected to a side wall of the chamber main body 2 at a 45 degrees confluent angle against the chamber main body 2 in a roughly Y shape. Thereafter, a socket 21 on the inflow side is provided on one end of the chamber main body 2, a socket 22 on the outflow side is provided on the other end, end parts of wastewater main pipes 7, 8 are inserted and connected, a socket 31 is provided on an end part of the branching part 3 and a wastewater branch pipe 9 is connected. Thereafter, wastewater flowing in the inside of the chamber main body 2 from the wastewater main pipe 7 flows to the wastewater main pipe 8 on the downstream side through a stepped part 2a from the upstream side of the chamber main body 2, and backflow of wastewater to the wastewater main pipe 7 side from the inside of the chamber main body 2 is prevented by the stepped part 2a. Consequently, it is possible to smoothly flow wastewater without stagnating it in the inside of the chamber main body 2.</p> |
