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Soundproofing Forum Topics => Soundproofing Generators, Pool pumps, Engine and Dyno rooms => Topic started by: jolsen on May 18, 2009, 08:10:55 PM

Title: Water Pressure Pump
Post by: jolsen on May 18, 2009, 08:10:55 PM

I recently have had a fair amount of plumbing work done and had a water pressure pump installed. For the room where the pump is installed I doubled sheeted the ceiling with soundblock board which were screwed onto resiliant bars attached to the ceiling joists so the screws holding the sounblock board wouldn't screw into the joists. I used this method in my utility room and it works fine blocking out the noise of the washer/dryer etc.

The problem I have is above the pump is a bedroom with bathroom and the noise seems to be traveling from the pump up the copper pipes and resonating around the bathroom which even with the door closed is still fairly loud in the bedroom.

Any ideas to even deaden the sound down would be hugely appreciated.
Title: Re: Water Pressure Pump
Post by: Randy S on May 18, 2009, 10:33:26 PM
The pipe is in contact with the structure, you need to decouple the pipe from any studs or joist it is in contact with.
Attaching pipe insulation to the pipe would change the resonence but without decoupling you will still get some remitting sound.
Title: Re: Water Pressure Pump
Post by: bicbuild on October 19, 2011, 01:40:37 PM
The problem with small domestic pumps is they can be extremely noisy, particularly at night.  The only way the noise from these can be reduced is to decouple the pump from the base with vibration absorbing mats and a concrete patio type slab.  The pump should also have an enclosure built around it as large as possible using fairly heavy materials such as 18mm MDF and lined on the inside with sound absorbing foam.  All pipework should  have flexible connections to and from the pump and should be sealed with Acoustic Sealant where the pipes penetrate the housing.  More information on how to soundproof a pump can be viewed on the web site of Sound Service (Oxford) Ltd.  Copy and paste the following link into the address bar of your browser to view and for more information.
Title: Re: Water Pressure Pump
Post by: Sladering on February 22, 2012, 07:39:43 PM
What would you do if the pump is a sump pump, one that is submerged under water?

Our basement's bathroom feeds all drain water to a sump pump that lifts the water up to ground level. The pump is inside a hole in the basement floor and is submerged under water. The loadest noise appears to come from the check valve that keeps water from going back down the vertical pipe once its pumped up the pipe. When that valve closes it sounds like someone slammed a door, particularly in the bedroom above. In fact when we first moved into our house we thought our daughter was slamming her door after every trip to the bathroom!
Title: Re: Water Pressure Pump
Post by: whatismisophonia on February 23, 2012, 06:20:07 PM
Is the valve old?  Buying a new and quieter valve may be the easiest and best solution, if not necessarily the cheapest.  Beyond that, insulate and decouple the pipe is all i can say without looking at it.
Title: Re: Water Pressure Pump
Post by: whatismisophonia on February 23, 2012, 06:42:09 PM

"To address the noisy check valve, consider rerouting the discharge pipe directly to the outside of the house rather than discharging the water into the sewer system. This should alleviate the need for a check valve."

"In order for the pump to work properly, water must freely drain into the sump. To accomplish this and get some sound dampening we'd suggest you build a wire cage around the pump covering the top and sides and wrap the cage with fiberglass or foam rubber insulation. Make sure to leave sufficient room at the bottom to allow the water to enter the sump. Also allow a 6-inch air gap between the cage and the pump so that the pump does not overheat. This should dampen the sound of the pump and the pipes enough so that you can get a good night's sleep."

considering that the pump is in a hole, the bottom edges of this cage would just rest on top of the concrete outside of the hole.