Need Helping Silencing the RO Water System

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Topic by JBrow posted 03-07-2016 08:36 PM 20171 views 0 times favorited 10 replies Add to Favorites Watch
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1 post in 929 days

03-07-2016 08:36 PM

Can anyone give me an idea on how to isolate the vibration of my RO pump and the associated low frequency noise making its way into the wall? This problem has annoyed us for 30 minutes almost every day for a year. The low frequency sound seems to travel throughout the house. I want to eliminate this annoying problem when I change the filters in the next few weeks. This is the opportune time to remount the unit.

I installed a pump assist whole house Reverse Osmosis System last year. I hung it on the wall in my water closet. Whenever the pump kicks on, a low frequency vibration is sent through the plywood mounting plate into the drywall and perhaps adjacent studs, and seems to travel up to a bulk head at the ceiling on the other side of the water closet wall. The stud cavity has 3-1/2” fiberglass insulation in the stud bays (formerly an outside wall). There is access into the bulk head, but it is limited to the stud bay directly above the RO unit. There is no insulation in the bulk head other than the limited fiberglass insulation I stuff into the accessible area of the bulk head.

The RO pump is attached to the metal mounting frame. The pump sets on 4 rubber isolation bushings. The metal support frame hangs on two screws that are driven into a plywood backer board. The lower part of the metal frame (about 3” below the hanging screws) of the RO system hanging bracket sets against foam weather stripping. The self-adhesive foam weather stripping is mounted to the plywood and looks to be fully compressed. As a result the RO system mounting plate makes contact with the plywood by 2 upper screws and the lower weather stripping.

I have ten 1 foot square x 1” thick acoustical sound absorbing panels I have been saving for this project. I just cannot figure out how to use them or if there is some other effective method. I have thought of placing a strip of rubber over the 2 screws, but I am concerned this limited isolation effort would not completely eliminate the problem. I do not have the space to build a separate wall on which to mount the unit. Any help is greatly appreciated!

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Dan Lyke

331 posts in 3822 days

03-27-2016 05:18 PM

I had noise problems with a sump pump and it’s associated lines. The solution was to decouple the pump and drain lines from the house as much as possible.

Can you put the pump on flexible mountings? Bushings on either side of whatever screws it’s mounted on? Maybe even take it off the wall and put it on concrete? Make sure that all of its feed lines are something flexibile like PEX.

That should help. There’s still vibration carried through the water, but again, flexible feed lines should help mitigate that, too…

-- Dan Lyke, Petaluma California, http://www.flutterby.net/

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07-25-2018 08:23 PM

Close the tank’s ball valve, by turning the blue top 90 degrees.
Tilt the RO framework to one side. Put something under the third channel lodging to keep RO tilted. This unsticks the air rises from the Check Valve.
You can go for the RO compatible water coolers for easy use.
Turn on the RO nozzle and let the unadulterated water move through the nozzle for around 1 minute. This powers the air to stream straightforwardly out to the nozzle, bypassing the tank.
Kill the nozzle. Sit tight for around 10 seconds. Rehash the past advance. Do that 3-4 times. On the off chance that you see air sputtering out of the nozzle, rehash Step-3 until the point when unadulterated water can stream easily from the nozzle, or until the point when the clamor leaves.
At the point when the clamor is gone, open the tank valve and let RO keep running not surprisingly.

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