You can see the 1"x6" board that I used to mount it on. I got so close on the measurement that I technically did not need much of anything to hold it in place, but that would only change with time and wear. I used brass-coated angle brackets, one on the top and two on the bottom, to attach it to the compartment's frame. The accumulator tilts a little downward due to pressue caused by the water lines. I plan on addressing that in the future.