minimum grade for 4 inch main is 1/4 in per foot

60 ft = 1.5ft drop. You have to be sure you can accommondate that.

所有跟帖： 

• 好像不行，要接入的管道大约也就在地下不到2尺深。不能一开始就在地下半尺铺管道吧。有无可能用更大口径的排水管？ -守月- ♀ (0 bytes) () 01/26/2024 postreply 07:56:29

• 6 in house main can have half the grade. -borisg- ♂ (91 bytes) () 01/26/2024 postreply 08:04:18

• 有4和6分两头的接头吗? -守月- ♀ (0 bytes) () 01/26/2024 postreply 08:11:14

• 4“ 有。 没用过6”的pipe -QinHwang- ♂ (0 bytes) () 01/26/2024 postreply 08:20:10

• Here is the thing. -borisg- ♂ (657 bytes) () 01/26/2024 postreply 08:31:20

• 不是city sewer:( .没注意外面是6寸还是4寸，但室内这段应该是4寸，连接这段也必定要换成大小接口。 -守月- ♀ (0 bytes) () 01/26/2024 postreply 08:42:03