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What do I trouble shoot, what are the usual culprits with this problem? Pretty sure it's not a water hammer because there is no clanking or banging..

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When does it happen? Can you see the surging if you open a valve? Have you measured the pressure and observed the pressure when the surging is happening? – BMitch Oct 9 '13 at 12:11
Well or community provided water? – bib Oct 9 '13 at 12:45
Community provided, no rhyme or reason to when it happens. – Nick g Oct 9 '13 at 14:12
Can you provide a little more info? Is this a rhythmic noise you hear 24/7? Or it pulses once or twice and then is quiet for an hour? Is there someone else in your house using the water when it happens? Or a washing machine? – Henry Jackson Oct 9 '13 at 16:40

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