For goodness sake DO NOT earth your antenna to a heater/plumbing earth point. You will pick up all sorts of interference
Not necessarily either, Tom, depends on Your "local realities". I'm doing since more than 2
years without suffering what you're mentioning. Would give it a try at least, better than nothing.
The pluming, heating system of course should not consist of "plastic tubing". Forgot to say, but expected to be self - evident.
Karl
Edited:
Forgot to say that of course “grounding” should NOT be accomplished by means of the mains “neutral or protection lines”. That is DANGEROUS as HI TENSION is associated with. And
yes!: in this case interferences have to be expected, especially if living in a, or close to industrial areas, where “rapid load changes” (spikes resulting) on mains supplies will be even noticed in their vicinity, thus even influencing the “neutral and protection” as mentioned above.
K