Standard Carrier Valve Plumbing:

In the above picture, the main water tank is connected to the hose on the bottom right corner. The first thing the water flows through is the flowmeter. Then you can see that the rinse line tees off the main line and proceeds to the suction side of the rinse pump. This line also tees and goes to the top valves of the stacks. The last item before the main line proceeds under your inductor and/or stacks, is the carrier valve.

Here is a closer look at the rinse pump in and out plumbing.