I have to install an outdoor shower for a rinse off to the pool. The shower valve has a solid brass body and I have to cut a hole about 7" in diameter to recess the valve into it.
How can I cut a 7" diameter for this? The trim is not much bigger so a clean cut would be necessary. My thinking is that I draw the outline on the concrete wall, then drill holes (many holes) along the perimeter using a hammer drill. Any other ideas greatly appreciated.