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Ive got banging noises when I open and close most of the taps in my 2 story house. I believe that the closing tap noise is generally thought to be water hammer and that the opening tap noise is usually considered to be caused by air in the pipes.

Yes, you can close the tap closest to the mains first. But remember to check the rest of the tapware for the next few days. If the hammer returns, then odds are there is a leak in your plumbing system.

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Thanks for sharing your question about your plumbing in the house. If you have conducted an air flushing procedure and the hammering comes back after a few days, odds are there is a leak in your plumbing system. I propose trying to find out first if any of your taps are leaking and this includes your laundry and cistern taps.

Ive bought a few Surgex water hammer arresters from Bunnings but they don't seem to do much at all. The water company sent someone to check water pressure and he said its air in pipes so switch off water and run all taps to clear it.

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202316 — A water pressure regulator can take care of high pressure issues and help you save money on your water bill.

2024313 — A water pressure regulator, also known as a pressure-reducing valve (PRV), is a valve that reduces water pressure as it passes into a home.

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To fix air in the pipes, is there a proper order to open and close the taps when you've a 2 storey house and an evaporative air con unit  upstairs ?

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Once the arresters are in place it should sort out your water hammering. Please note that the installation of the arresters must be done by a licensed plumber.

That's exactly the sequence you should do. But my best advice is to have the rest of the family standing by on each tap so that they are all shut down quickly. In regards to distance or which one is turned off first it really does not matter.

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I was mostly wondering what the order was for getting rid of the air in the pipes. Once you've turned off the mains water and ran all the taps, are you meant to turn on the mains water with all taps on, and then close each tap starting with the one closest to the mains tap first *or* with the tap furthest away upstairs first ?

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My next suggestion is to install the following devices in your plumbing system. For your laundry set, I suggest putting in Sioux Chief 20mm Chrome A Size Wash / Dish Water Hammer Arrestor on the cold line of your washing machine.

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A pressure reducing valve (PRV) is a type of valve that reduces a higher upstream pressure to a stable lower downstream pressure.

So, just checking, but the order is to close each tap starting with the one closest to the mains tap first ? (Just checking as I mentioned 2 orders before)

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For the kitchen sink and bathroom taps, I recommend the Sioux Chief 15mm Size A Hydra-Rester Water Hammer Arrestor With Conetite Tee. Place the arresters on the cold line of those taps.

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