This looks like problematic to me.

The distance is way too long for you to have a descent grade of flow. This will slow down water flow and cause clogging in the long run. 

You can manage that but you will have to have at least two clean outs on the surface, one in each direction.

所有跟帖： 

• 我当初有跟他提过cleanout, 这条排水管只负责洗衣房和主卧。若再有问题，知道在哪里挖再加cleanout也简单了。 -守月- ♀ (293 bytes) () 04/09/2024 postreply 12:38:20

• That's true, it's not deep. Dig a hole and add one doesn't -borisg- ♂ (26 bytes) () 04/09/2024 postreply 12:40:01

• 主水管确实应该一次弄好。返工太麻烦了 -tallcuterich- ♂ (0 bytes) () 04/09/2024 postreply 23:41:30