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： 

• 我在南邊，12月底和一月初有時會下點雪，整體冬天有個別天會很冷，但多數時候不冷。這次換就換PVC不怕凍的 -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，謝謝 -red_flower- ♀ (0 bytes) () 01/08/2023 postreply 17:46:17