Pipes banging when irrigation system is on

Are you sure it's the pipes banging and not "water hammer". I have a faucet with hose I ran to my 2nd story back porch to make it easier to water all the potted plants on the porch and hanging from the ceiling. My wife will often water them and that is when we get water hammering going on because she doesn't turn on the water quite hard enough to prevent it.

When I water, I turn the faucet all the way on and adjust how much is released by the spray attachment on the hose.

If you are not familiar with water hammering, look it up to get a better explanation.

Search water hammer arrestor. These fixed the issue for me with my sprinkler timers opening/shutting.

Might have air in your lines. Try to purge all your lines with the water off and see if the heads pop up which should be enough to purge them. I had the same problem with Zone 3 and that's how I fixed it.

quote:

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ended up getting a can of spray foam and sprayed it down the holes the pipes go into in the attic.

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That’s a damn good idea.