| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pipe fitting for drainage collecting pipes with which the drainage flowing in is decelerated and revolved and a counterflow to a lateral branch pipe is precluded. SOLUTION: A pipe fitting for drainage collecting pipes is composed of an upper riser pipe connection hole 11, a body 13 which has in the lower part a tapered pipe part 17 and is furnished under the riser pipe connection hole 11, a lower riser pipe connection hole 19 installed under the body part 13, at least one lateral branch pipe connection hole 20 installed on the body part 13 and is capable of connecting the lateral branch pipe, and at least one revolving guide 25 formed protrusively on the inside circumferential wall 15 of the body part 13, wherein the body part 13 is equipped with at least one deceleration guide 30 which is protruding from the inside circumferential wall 15 under the connection hole 20.</p> |
