【HaiChuan Pipeline Discussion】How to install sewer pipes correctly

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I came across a case online, and I’d like to share it with you. Three master plumbers created different drainage system designs in the same location, which puzzled the new person in charge of inspections – how could all three methods be approved? The person in charge said to gather these three plumbers and have them explain how they can do better. Plumber No. 1 said: Don’t argue with me; my method is the most standard. I use fewer accessories, so there are no water hammer problems. You guys, No. 2 and No. 3, should do it in the same way as me. The plumber on the 2nd said: It’s something the boss bought, and he asked me to find a solution. There isn’t enough material for the pipes, but the boss said as long as it can be installed underwater, that’s fine; there will be no problems on the 2nd either. Plumber No. 3 said: Precision and accuracy are things that we plumbers must adhere to. I make sure everything is perfectly vertical and horizontal; those who don’t follow these standards are just abusing their power. My method is the standard one. After hearing the feedback from the three craftsmen, the inspector couldn’t make a decision either and had to seek advice from others. In the field of plumbing and drainage work, what is the standard method for outdoor sewage outlets?