I have a system that has two zones and each zone is fed off of a single sprinkler main. The zones tap the sprinkler main and provide anti-backflow’s for their respective zone. My question is can I install the flow meter after the sprinkler main manual shutoff valve but prior to the zones with anti-backflow devices. The only concern I see with this installation is that if the municipal system reversed flow the valve would not be protected. Valve is probably not rated to be connected to a Potable Water System.
Is it a code issue? Yes! I found viz the support page “that flow meter is not certified for use on Potable Water System”.