I have spent an hour searching the forums on this topic and I am more confused than when I started. I realize local code differs and that may be why the various threads are difficult to understand.
As context, I live in southern California. Our main water line splits into irrigation line and house line in front of our house. The irrigation line has both a reduced pressure valve and a RPZ backflow preventer immediately after it splits (see picture). The main irrigation line has one tee that goes to the sprinkler manifold / valves.
Our previous setup for the pool line had the water main going to a valve that is 12" above ground (see picture). I am relocating this to a different part of the backyard and want to make sure I install properly.
Main questions are 1) is if tying into the main irrigation line downstream from the tee that goes to the sprinkler valves / manifold is okay and 2) if yes do I need to have an additional RPZ backflow preventer, check valve, vacuum breaker, etc on the pool supply line even though we have one upstream preventing any backflow to the water main?
Link the pictures
Pool supply line - Google Drive
As context, I live in southern California. Our main water line splits into irrigation line and house line in front of our house. The irrigation line has both a reduced pressure valve and a RPZ backflow preventer immediately after it splits (see picture). The main irrigation line has one tee that goes to the sprinkler manifold / valves.
Our previous setup for the pool line had the water main going to a valve that is 12" above ground (see picture). I am relocating this to a different part of the backyard and want to make sure I install properly.
Main questions are 1) is if tying into the main irrigation line downstream from the tee that goes to the sprinkler valves / manifold is okay and 2) if yes do I need to have an additional RPZ backflow preventer, check valve, vacuum breaker, etc on the pool supply line even though we have one upstream preventing any backflow to the water main?
Link the pictures
Pool supply line - Google Drive