Copper Plumbing
- Best practice for underground copper - [1]
- Codes- backfill can't be greater then 1/2" for copper pipe [2]
- Soil burial for 3/4" water line - p16 - [3]
- SAS - Copper plumbing tubing is called by its nominal ID - [4]. OD will be larger. That is reasonable. BUT ACR (HVAC) tubing is called by its outside diameter! SAS affirmed.