| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a header whose service life is improved by preventing the thinness of the inner wall of a synthetic resin branch short pipe. SOLUTION: In a cylindrical header body 1a, a main pipe connecting part 11a is formed at one end, the other end of the cylindrical header body 1a is formed as a closed part 12a, a plurality of branch holes 2a is opened in the side wall of the cylindrical header body 1a, a synthetic resin branch short pipe 3a is engagingly installed in this branch hole part 2a, and a synthetic resin or rubber short cylinder 4a is attachably/detachably mounted in this synthetic resin branch short pipe 3a.</p> |
