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How noisy will Plumbing through living room wall be?

Posted by mvmartin (My Page) on
Wed, Jul 28, 10 at 19:10

Were adding a 2nd story to our 1924 Bungalow. Theyre wanting to run the 2nd floor waste and water line down through a wall very near our living room. Im concerned about the noise when mostly when someone is taking a shower (both from the waste and water lines). My question is, should I be that concerned and what can we do about it? Its a true 4" wide wall, so there wont be much room to put insulation on all sides of the 4" waste line. Were going to be putting in 5/8" sheetrock.

One option is to move it to an outside wall, but since theyve already started plumbing it, this has some cost implications.

Right now, the elbow they have right at the top of wall is PVC, but the straight portion of the line down through the wall is cast-iron.

Thoughts? Thanks.


Follow-Up Postings:

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RE: How noisy will Plumbing through living room wall be?

Pressurized lines are generally quiet -- but not always. Gravity drains are generally noisy. Existing structure typically limits/dictates what can be done. Decisions typically limited. If you've got money, modifications can be made but if you're already into it such changes will likely be expensive. Have to decide how long you're going to be there and how important it is to you.


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RE: How noisy will Plumbing through living room wall be?

If it were cast iron it would be quiet. (Does anybody do that any more?)

An alternative (to go with PVC) might be to add an extra layer of sheetrock.


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RE: How noisy will Plumbing through living room wall be?

Thanks. They're actually using cast iron for the waste line, but have PVC on the 45 degree elbows and connectors.

We're planning on being there for years and years, so we want to do it right (plus the house will be there, we hope for another hundred). Couple of days work to redo.


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