Select a rectangular copper planter at least 24 inches long, 6 inches wide and 12 inches deep. The planter should not have drainage holes. Purchase acrylic sheeting measuring the desired height of your waterfall, subtracting the height of the planter. The acrylic should be as wide as the copper planter, subtracting 2 inches.
Drill 1/8-inch holes in the corners of the acrylic sheet. Place the copper planter against the wall and attach the acrylic sheet to the wall directly above it with wall screws. Locate the wall studs and attach the acrylic to the studs wherever possible. If there are no studs available, use wall anchors to hold the acrylic in place. The bottom lip of the acrylic sheet should be flush with the top of the planter.
Cut a section of half-round copper gutters to fit the width of your acrylic sheet, plus 8 inches. This is the horizontal section of your waterfall frame. Cut two sections of half-round copper gutters to fit the height of your acrylic sheet. These are the vertical sides of your waterfall frame. Drill 1/8-inch holes along the center of the horizontal section of copper gutter. The holes will allow the water to fall from the gutter over the acrylic wall. Drill a 1-inch hole in the center of the horizontal copper gutter, 1 inch from the end without the end cap. This is where you will insert the plastic tubing that circulates the water for your waterfall.
Attach the copper end cap to one end of the copper gutter that fits the width. Waterproof adhesive will work to attach the end cap to the gutter.
Attach the two copper gutters that fit the height of your wall waterfall to the wall on either side of the acrylic sheeting. The gutters should have the decorative half-round facing out, and the open side against the wall. Copper screws will work to attach the gutters to the wall. Insert the screws into a wall stud wherever possible.
Place the horizontal section of copper gutter across the top of your acrylic sheeting. The ends should rest on top of the two side gutters with the open section of the gutter facing up. Attach the horizontal gutter to the vertical gutters with waterproof adhesive.
Attach one end of the plastic tubing through the 1-inch hole in the horizontal gutter. Thread the tubing all the way down the gutter until only 1 inch of tubing remains at the top. Secure the plastic tubing to the copper gutter with duct tape.
Attach the plastic tubing exiting from the base of the gutter to the water spout on the waterfall pump. Place the pump inside the planter and add decorative stones around it. Fill the planter with water. Turn on the waterfall pump.