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Black plastic pipe in crawl space???


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I came across this black short pipe in the crawl space. It was located near the access door away from any plumbing pipe. Possible future Radon system??

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[:-bigeyes [:-alien]

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That is a back flow prevention valve. It's in the main waste line to prevent municipal sewer line backups from coming into the house. Although you may not see a waste line exposed near it, the line could travel out of the structure under the grade in that area.

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The pipe sticking up out of the ground is just a pipe.

The thing at the very bottom of the pipe is the cover from a backwater valve, as John described. I don't see how anyone can actually open the cover in this situation. Someone should excavate a larger hole and put in a sump liner or something with a little elbow room in place of the pipe.

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