this depends on where you live and how cold the winter gets.

in places you don't have to worry about frozen earth, the sewage can be as shallow as a couple of feet. It's not a big job to dig up and replace. But in cold places the sewage has to be deep enough to avoid freezing. For example, I had a couple of digs that went to 8 ft below...Now that's more than a permit from the town or city, this gets into the OSHA regulation territory...

所有跟帖： 

• 我在南边，12月底和一月初有时会下点雪，整体冬天有个别天会很冷，但多数时候不冷。这次换就换PVC不怕冻的 -red_flower- ♀ (0 bytes) () 01/08/2023 postreply 15:12:29

• then you will be looking at maximum depth of about 3ft. Easy -borisg- ♂ (76 bytes) () 01/08/2023 postreply 15:22:14

• 好，谢谢 -red_flower- ♀ (0 bytes) () 01/08/2023 postreply 17:46:17