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Thread: Waterguard Aerator Noise

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  1. #1
    DIY Junior Member zver11's Avatar
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    Default Waterguard Aerator Noise

    I installed a Waterguard Radon Aerator. It involves a sprayer and a repressurization pump(submersible 1/2 HP in sprayer tank) and output pressure tank/pressure switch. Output gear similar to well pump equipment. The problem is a loud thump sound every time the pump turns off. Loud enough to be heard in much of the house (unit is in basement). Pressure tank at 38PSI precharge. Pressure switch was at 60/40. Tried lowering to 55/40 to see if noise affected. No change.

    Any advise on noise abatement? Is this noise normal in a well pump with the noise not heard because it is too far away or is this something that can be improved with some adjustments to setup?

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    DIYer, not in the trades LLigetfa's Avatar
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    My guess is that the aeration may be precipitating some elements in the water and that is causing the checkvalve to gunk up and not close fast enough. The result is a sudden backrush of water and subsequently the checkvalve slamming shut creating water hammer.

    Most pumps use a checkvalve without any springs. Probably the simplest fix would be to install a spring-loaded checkvalve directly on the output of the pump..

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    DIY Junior Member zver11's Avatar
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    Notice at *******************, a magnetic spring loaded check valve. Claim quieter than normal spring loaded. Any opinion on this?

    Pump is Sta-rite DM series. Not sure if existing check valve is internal or mounted just at mouth of pump. Does this need to be removed or just install another check valve downstream? Assembly provided by aerator maker has pump connected to approx 4" light blue segment then dark grey plastic pipe (not look like ABS) to 1.25" PVC union. Light blue segment is cylindrical and not noticeably thicker than pipe. Is it possible light blue segment is existing check valve?

    Also if I install another valve downstream, can it be upside down? Anything external to tank would need to be upside down given piping configuration.

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    DIY Junior Member zver11's Avatar
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    Never mind on magnetic--not suitable for application. Is there any reason not to just use the spring loaded PVC valves at Home Cheapo? Being above ground, not as big a penalty if they fail as something hundreds of feet underground.

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    DIYer, not in the trades LLigetfa's Avatar
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    I'm not a fan of cemented PVC. Threaded PVC is fine for the male ends but prefer brass or SS threaded female.

  6. #6
    DIY Junior Member zver11's Avatar
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    Installed acetal plastic check valve exactly identical to original except now has spring installed (apparently manufacturer sells same valve with and without spring) Water hammer gone but now a new problem has appeared on reassembly.

    When the pump runs, there is a load grinding noise. Any ideas as to cause or solution?

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