The attached picture is a crude drawing of my system. I have a Kinetico Mach series softener and an Aqua Systems Aerator tank to add oxygen to the water. The left tank is the water holding tank from the well. The middle tank is the Aerator. The right tank is the Softener. The red marks are the 4 handle valves. I think I have accidentally opened the bypass valve, but I can't tell if it is the farthest red valve on the left or the yellow valve in the middle. The yellow valve is attached to a pipe that begins before the aeration or softener tanks and runs parallel to the main water line and is a smaller diameter than the other lines. Three valves are red, and one is yellow. Can you tell if the bypass valve is the one farthest to the left or the yellow valve?