Hey Guys,

I have a dual tank setup fitted exactly as in the below diagram with the AMR hydro valve.

http://www.amrgas.com/hydrostatic-te...es#prettyPhoto[123]/0/

I'm wondering if there's a way to "temporarily" isolate the aux tank from the filler line(blocking it),
so when I fill, it will only fill the main tank.
I don't wanna install a separate filler at this stage, but rather looking for a method like a shut off valve that I
can turn to shut the fill line to the aux tank(just like the shut off valve on the supply line).

Can I use a shut off valve from the supply side to accomplish this?