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Thread: Roman tub diverter noise

  1. #1

    Default Roman tub diverter noise

    Hi All,
    My newly-installed Jason roman tub (in newly-built house) makes lots of noise when the diverter valve is set to supply the tub spout. When set to supply the sprayer, the noise vanishes. Noise is rushing water sound and can be heard throughout the house. The installing plumber says the noise is due to the use of 3/4-inch pipe from diverter to spout, which is needed for large tubs. The main valves are at the head end of the tub, and the diverter, sprayer and spout at the foot end. So it's only the last 2 feet of run (from diverter to spout) that's involved in the noise. Would replacing the diverter valve likely improve situation? Or does use of 3/4-inch pipe necessarily mean noisy flow?

    Thanks,
    Reasen

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    I'm assuming that they used 3/4" supply lines, but is the divertor also a 3/4" valve? When using the shower, a 1/2" valve can easily supply the water to one or two showerheads, but it acts like a restrictor when filling the tub. That restriction, if it exists, could make noise.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3

    Default

    Good idea. I'll check to see what diverter was used, and whether all three ports are 3/4-inch. I guess it's possible that the output ports are 1/2-inch and the plumber used an adapter to go from 1/2 to 3/4 on the leg to the spout.

  4. #4
    Moderator & Master Plumber hj's Avatar
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    Default noise

    Larger pipes reduce the noise, they do not cause it.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    IF the feed was 3/4" and they used a 1/2" diverter valve, other than reducing the flow, couldn't that create some noise?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6

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    OK, I finally have a photo of the diverter plumbing which (hopefully) was uploaded. The diverter itself appears to be 3/4 inch all around. It is reduced to 1/2 inch for the hand sprayer (which runs real quiet). The short run from diverter to spout has 3 90-degree joints in view, and at least one more going up to the spout. I don't know why the plumber didn't use the more direct diverter port, which is just capped. Could all the 90's be creating the loud noise when water runs to the spout? How is the pipe supposed to be secured to the blocking? Or is it?
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