How to Regulate Sulphuric Acid Dosing When it is not Required?

What should be done with sulphuric acid dosing when its use is not required? How should the equipment be set up?   

We are installing the sulphuric acid (96%) dosing rig for pH correction. However, it may need to be used only for 8 weeks per year and we need to consider safety while cleaning and when it is not is use. 

We are looking into using non-return valves or similar valves to prevent the sulphuric acid from getting into water when it is not needed. Additionally, we are exploring the possibility of using continuous recirculation so the dosing rig is available when needed.

Does anyone have a better suggestion or experience with sulphuric dosing?