A millstone is a large, flat stone used in mills to grind grains after they've been harvested. The top of the millstones contain grooves called furrows, which are arranged in a pattern designed to allow the mill to crush the grain and extract flower. Some people have converted old millstones into backyard fountains, as the flat, grooved surface allows water to gently flow over the stone.
Dig a hole that matches the width and depth of the plastic fountain tub or pond liner. Level out and tamp down the soil inside the hole, and remove any sharp objects like stones that can pierce the tub or liner.
Backfill the gap between the tub and the side of the hole with dirt. Lay a level across the top of the tub at different locations to check it for level. Adjust the tub if necessary.
Stack bricks in a triangular pattern around the centerpoint of the tub. Use enough bricks so that the top layer is even with the top edge of the tub, or as close as you can get.
Place the pump into the tub in the centre of the bricks.
Dig a trench 2 inches deep and 2 inches wide between the area where you placed the pump in the tub and the nearest electrical socket.
Slide the pump's plug through a 1-inch PVC pipe, and lay the pipe into the trench with the plug end near the outlet. Backfill the trench with dirt to cover the PVC pipe.
Fill the bottom of the tub with gravel and small rocks until you get 3 to 4 inches beneath the top of the tub and then add larger, decorative stones inside the tub until it is full.
Place the extension tube onto the pump, following the manufacturer's instructions.
Slide the millstone over the extension tube and onto the bricks.
Cut away the extension tube that extends past the top of the millstone.
Fill the tub with water.
Plug the cord for the pump into the outlet.
Do not place the fountain underneath any overhanging power lines. Call 811 before you dig the hole for the fountain to get the buried utility lines in your yard marked.