I am considering converting one of my 3 wash bays to a mud bay. The current bay is perfect to pull trailers in and has the smallest drain of all 3 bays. It fills quickly. I’m considering blocking the drain and sloping the concrete out the side to flow under the brick after slots are opened. I plan to only provide a water rinse option. Has anyone tried something like this? The carwash is beside a lake and hunting areas. Very rural. Idk