quiet drain noise

wkearney99

Ok, so I know cast iron does a better job of reducing drain noise for vertical drops. But what about the horizontal sections? We've got a master bath that's going to be over a large family room. I don't want to be hearing the tub, toilet and shower downstairs. There will be a number of 5 to 7' stretches of drain to get from the various fixtures to the vertical pipe. Should these also be in cast iron?

Sure, there's an added cost, but I *really* do not want the noise.

VIPlumber

I've used Schedule 80 ABS in these situations. Smaller id, same od, thicker wall which helps to lessen the water noises.

joecaption

Adding some insulation and using 5/8 sheetrock on that wall will also help.

TheEplumber

Insulation is good. Also consider sch 40 or 80 pipe instead of foam core DWV pipe. Cast is pretty spendy and heavy- I'd almost consider copper instead....
There are commercial grade pipe insulation systems available. Perhaps you can find a pipe wrap company in your area and cut a deal with him.

__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions