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Thread: Water Hammer Arrester - Must be Vertical?

  1. #1
    DIY Junior Member larrymcg's Avatar
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    Question Water Hammer Arrester - Must be Vertical?

    I'm guessing this is a silly question, but..... Does the tube of a water arrester have to be vertical?

    Since the arrester tube has a piston that separates the water from the contained gas, I thought there could be a chance that the tube could be horizontal.

    I want to put arresters on the hot and cold lines to the clothes washer but the current flexible lines connect to shut-off valves with outlets that go straight down. So connecting something like the Sioux Chief Min-Restor at the shut-off valves would have the tube in the horizontal direction.

    --Larry

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    Forum Admin, Expert Plumber Terry's Avatar
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    They can be horizontal.
    However, you can also mount them on the washer and keep them vertical is you want.

  3. #3
    DIY Junior Member larrymcg's Avatar
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    I wonder why I didn't think of mounting them on the washer? The connections on the washer are above each other so I could mount the top arrester vertically and the bottom one at a slight angle to miss the top one!

    Thanks,
    Larry

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    Ideally, the arrester is installed as close to the quick-acting valve as possible...and, with an engineered on, orientation is irrelelvant.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    Moderator & Master Plumber hj's Avatar
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    Point the top one up and the lower one down. They will work effectively in either direction.

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