Filter plate holders are designed for 7, 15, and 20 bar operation in a plate filter press. They are offered for sidebar or overhead press designs. Side handles and mounting hangers can house any brand of filter. This is almost alike to the open filtrate design, but with the adding of corner pads. Holes in these corners make a pipe or tube and accumulate the filtrate, which is discharged to a variety at the feed end of the filter press. Spigots may be used to inspect the filtrate externally.