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I don't get it.
There are two water systems in your house.
1. Potable water (drinking water)
2. Radiant Heat.
Which pipes are banging? I ask cause you say "when the water is run" Implying the drinking water supply is the source of your banging.
The two are essentially separate systems, though the boiler will have a pipe that allows the system to be filled.
If it's your drinking water and the pipes are banging when you shut off the water, this is called water hammer. You can buy water hammer arresters at home depot and install them close as possible to all faucets.
If it's your rad pipes, and the system bangs when the boiler comes on, 1. you need to bleed your rads, there should be bleeders at all the rads (mind you they are probably seized and when you go to turn them, you are liable to break them off in your hand.) As another poster mentioned, you need to have an expansion tank that works as well.
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