[John Candle]

I have been putting coax in the mast for years , better then taping to the mast or letting the coax swing in the wind. The coax shield is grounded so having the coax in the pipe provides more shield. . Using a coax grounding block with a wire to ground such as a ground rod , or even if it is a metal cold water pipe that has metal pipe that goes into the ground to the water main is Ok. I say real metal water pipe because some pipe used now days is plastic. I have seen outside water metal water faucets with a short metal pipe that goes in to the house but rest of the piping in the house is plastic. Any way having the coax grounded diverts atmospheric static and interfering signals to ground.