I have a loud noise coming from my pipes when I turn on the cold water in the shower and when I flush the toilet in the same bathroom I have followed all the steps to try to drain the air from the pipes with no success what I did notice is that when I turn the water back on is that I can hear the same noise at the vale I also can see and hear the noise in the pipes for my sprinkler, the bathroom that the noise is coming from the outer bathroom next to the point where the main water line runs into the house.

Can you describe the noise? A bang? A thump? A squeel? What" Back to you. Tom

It is a bang and it is only coming from the shower, toilet and the out side spiket on that side of the house

Your air chambers, (shock arresters) may be loaded up and need recharging. How old mis your house? We begin to install air chambers on all vanities and kitchen sinks back in the 60's. If your home's newer I can instruct you on how to recharge them. Back to you, tom