07:49AM | 05/28/04
Member Since: 05/27/04
2 lifetime posts

I have a problem with the noises coming from the discharge pipe that's attached to the sump pump in my basement. Every time the pump goes off, the water is expelled to the sewer system fine but the sound of the water running through the discharge pipe is very loud and can be heard sometimes from the basement to first to second and sometimes, to the third floor.

If I even tap the pipe lightly in the basement, the tapping sound can be heard on the 2nd floor. It's starting to get real annoying and is causing sleep problems for my family.

The house is newly built and we've heard it since it was built 2 yrs ago. Do you think that it's a problem with the discharge pipe not being insulated properly for sound or a part of the house not insulated or sound proofed properly from the ground floor up? The discharge pipe shouldn't go anywhere above the first floor so I imagine that for sound of water to continue traveling upwards, there must be something missing to block the sound?

Any help would be greatly appreciated.


plumber Tom

11:35AM | 05/28/04
Member Since: 05/10/03
801 lifetime posts
The fact of the matter is PVC pipe is loud when used in a drainage application. I always explain to my cutomer's in detail the choice of materials when replacing a cast-iron stack. In your case you can change out the PVC and install DWV (drainage waste vent) copper pipe. It's the less expensive thickness of copper pipe.


01:28PM | 05/28/04
Member Since: 05/27/04
2 lifetime posts
But does it explain why the noise is traveling all the way up the stack? Is it normal that I should hear sounds made from the bottom of the stack all the way up to the top?

Is there some kind of dampener that I can install close in the main waste and vent stack or somewhere else that will absorb the sounds and make it not as noisy?

plumber Tom

06:01PM | 05/29/04
Member Since: 05/10/03
801 lifetime posts
Not sure on canadian code, but discharging the water to the outside may be an option if it's legal. You would have to find the grade level and cut the pipe and cap off the old line. At least this way the water is not running thru the main house drain and it may be quieter.
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