The picture shows the diverter valve for my roman tub. When feeding the tub spout, the pipes generate LOUD rushing water noise, heard throughout the house. When set to the hand spray, nice and quiet flow. Notice the multiple 90-degree bends in the line to spout. Could they be causing the noise? Is it obvious why the plumber didn't make a straighter run to the spout? Would a straighter run reduce the noise? Can the unused outlet on the diverter be used for spout? Can 3/4 inch copper tubing be used? This is all new construction and plumbing.