A concrete form for installing a bath filler includes a base having an exposed top surface, a perimeter wall extending along each side of the base and oriented perpendicular to the base, and a rim extending from a top edge of the perimeter wall outwardly from the exposed top surface. The concrete form includes at least one notch disposed along the rim, such that the at least one notch is configured to align with a desired location of the bath filler. The concrete form includes a drill template corresponding with the notches. The drill template includes a plurality of markers configured to indicate drill-hole placement.