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Thread: getting rid of hammer

  1. #1
    DIY Senior Member v1rtu0s1ty's Avatar
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    Default getting rid of hammer

    I built a homebrew automated sprinkler system with the use orbit 3/4" sprinkler valves and garden hoses. It's just connected to the spigot outside. That means, it's temporary and I will have to remove it in winter. It's working pretty well.

    However, eventhough it's temporary, I would like to address an issue that I am experiencing. There are times when it turns off, I will hear a loud hammer on the pipes. About 85%, it happens. Are there any ways to prevent it without putting a hammer arrestor? I'm looking for a temporary solution if there are any.

    http://i303.photobucket.com/albums/n...es20090814.jpg

    Thanks!

    Neil

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    DIY Senior Member upper's Avatar
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    What type of valves.And how is it piped between the valve and the faucet? Upper

  3. #3
    DIY Senior Member v1rtu0s1ty's Avatar
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    Hi. This is what I have, 3/4 inch Orbit Sprinkler Valve 57100 model. Please see link below.
    http://www.orbitonline.com/products/.../02/16/04/643/

    The faucet is about 7-8" higher than the valve. I'm using a pvc pipe. Please see picture below.


    Thanks.

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
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    The easiest fix would be to remove the brass hose bib with galvanized coupling,
    Replace the coupling with a threaded tee, and insert a threaded hammer arrestor in one side of the tee.
    Attached Images Attached Images  
    Last edited by Terry; 08-25-2009 at 04:58 PM.

  5. #5

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    what/how many heads are connected at the end of the hoses? how long are the hoses? what is the pressure?
    Last edited by tomm; 08-26-2009 at 08:32 AM.

  6. #6
    DIY Senior Member v1rtu0s1ty's Avatar
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    Quote Originally Posted by Terry View Post
    The easiest fix would be to remove the brass hose bib with galvanized coupling,
    Replace the coupling with a threaded tee, and insert a threaded hammer arrestor in one side of the tee.
    That's a very cool idea! I'm going to print out my picture and bring it to the store. Thank you so much!!!

  7. #7
    DIY Senior Member v1rtu0s1ty's Avatar
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    Quote Originally Posted by tomm View Post
    what/how many heads are connected at the end of the hoses? how long are the hoses? what is the pressure?
    1st valve - one oscillating sprinkler
    2nd valve - one oscillating sprinkler
    3rd valve - 3 impact sprinklers

    The garden hoses pipe lengths are somewhere 60ft long per.

    I think the length of the garden hose doesn't matter. It's because, the hammer happens before the sprinkler valve.

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