It’s the same as any other flow actuated unloader. You can do all the same stuff as you do with trap unloader. Your hose can still blow if it wears out. Sometimes there can be a delay with a pressure tip. Once you go flow actuated you never go back.
I’ve got the k5, but it’s supposed to work on a similar principle.
Hoses will still burst just like a regular unloader, though possibly less often because you’re not carrying high pressure in the line all the time.
250’ of hose should be no problem
choking back with a ball valve too much will cause the unloader to cycle. The unloader is designed to work within a certain gpm range. Bypass more than that, and it goes wonky.
I have no trouble with injectors. And I think they’re less likely to get the ball jammed with a flow unloader. You might have issues if you suck air into the line with it, though I haven’t had any issues when I’ve run out of bleach on occasion.
I’ve read several posts on adjusting the k7. Do you need a pressure gauge to adjust it correctly? Or can I just tighten the bolt until there is a trickle of water from the bypass when the trigger is pulled?