I have held a battery operated AM-FM radio close to a non-grounded water pipe. I get a stronger signal near the left (26‘)and bottom (24‘) legs of the T but no signal near the right side(4.5‘). All sides of the T are running in horizontal plane.
Cool, I had no idea it did that.
The 26' and 24' legs are closer to the wavelength that you are bringing in and thus work as an antenna.
