Setting of drainage inspection port ！

1. Inspection openings shall be set on the drainage riser, and the spacing shall not be greater than 10m. When mechanical cleaning is adopted, it shall not be greater than 15m, but it must be set on the bottom and top floors of buildings.

2. The height from the center of the inspection opening on the riser to the ground is generally 1.0m, forming an included angle of 15 ° with the wall. The center of the inspection opening shall be 15cm higher than the upper edge of the sanitary ware on this floor.

3. If a B-shaped pipe is installed on the riser, an inspection port shall be installed on the B-shaped pipe.

4. Cleanouts shall be set at a certain distance on the straight pipe section of the horizontal drainage pipe, and the maximum spacing shall meet the requirements.