[Mikendebbie]

I have never tried to access my tank valves, but my understanding is that you can't access the valves without removing the coroplast bottom...maybe not the whole bottom but it might be possible to create an "access hatch" in the coroplast to get to the valves. Hopefully someone here can give you better advice. The sketches below (side view and plan view) illustrates approximately where the tanks and the valves are located. I developed this sketch from watching the various "Montana factory tour" videos on youtube.