Re:UV WATER TREATMENT
Wow sorry to hear you missed your season.
HDs can be a pain especially when a new owner takes over an existing business that was grandfathered in for years. And too late for you but a buyer of any food truck, trailer, or BM operation, should always do a walk through with the HD before they sign anything.
My only advice is go to your HD and ask them for specific requirements and then get online and start searching for a system that meets the specs. And once I found one before I bought anything I'd go back to the HD and show them pictures, specs, all the information, and be sure your good to go before you spend the money. And then get a good estimate on how much it's going to cost to install the system.
It sucks I know but the more you try and work with the HD on this issue the easier they will be on any other issues.