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alpuzz
Basement Plumbing

Hi,
I purchased my current home six months ago and it was clearly plumbed for a basement bath when it was built in 1997. In the corner of the basement there are three PVC pipes sticking out of the floor, one 3.5in, two 2in and a stack about 8 feet away. The largest of the three is the toilet and I assume the other two are the sink and shower. However, how can I determine if these were vented when installed?

Re: Basement Plumbing

Hello, Hard to see without a photo and layout. If done properly there will be one of the vents(2" or 3")rising up and back venting into a stack vent going through the roof. If not you have to run one of those lines as a vent. Going above the highest fixture and back venting into a vent. If you tie a vent into the waste stack that is coming down from above you will have a "wet vent" and then waste can back up into the basement shower, tub or sink. Be careful, check it out in detail before doing anything. hope this helps.;)GregC

Re: Basement Plumbing
GregC wrote:

Hello, Hard to see without a photo and layout. If done properly there will be one of the vents(2" or 3")rising up and back venting into a stack vent going through the roof. If not you have to run one of those lines as a vent. Going above the highest fixture and back venting into a vent. If you tie a vent into the waste stack that is coming down from above you will have a "wet vent" and then waste can back up into the basement shower, tub or sink. Be careful, check it out in detail before doing anything. hope this helps.;)GregC

If you tie a vent into a drain you don't have a wet vent you have a code violation! Vents can only be connected to other vents period. A wet vent is both a drain and a vent.

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