Mystery Vents

Old 05-11-16, 05:04 PM
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Mystery Vents

My ranch style house is built on a slab. There are three black"vent pipes" around the outside perimeter. They are three or four inches from the foundation and stick up out of the ground about 6 inches. 2 are surrounded by sidewalk; the third by dirt. They have removable domed caps. Can anyone tell me what they are?
Old 05-11-16, 05:31 PM
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Interesting. Doesn't sound like a plumbing vent. I wonder if it is some sort of radon venting for a slab, totally wild guess. Do you have a radon fan anywhere?

Old 05-11-16, 05:41 PM
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Welcome to the forums.

Do you have septic or city sewer ? I'm thinking possible cleanout locations for sewer.
Old 05-11-16, 07:10 PM
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A quick Google shows radon is definitely a problem in the Edinboro area so I'd say radon vents.
Old 05-12-16, 05:24 AM
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If they where radon vents they would not be capped.
Old 05-12-16, 05:51 AM
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I'm also thinking sewer clean outs, could you post some pics -
Old 05-12-16, 05:56 AM
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Joe, I took a stab and Googled "domed caps for vent pipes" and a whole bunch of vented caps came up. So agreed, we need to know if these are sealed caps or vented caps.

Also didn't see any vents being added to a Radon system anywhere and, in PA those would probably get covered with snow rather quickly.

Maybe the op will return and help.

Old 05-12-16, 06:07 AM
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Mystery Vents

May not be vents at all. Could be termite bait stations.
Old 05-12-16, 06:54 AM
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Could also be foundation drain cleanouts, especially if the basement has ever been waterproofed, as they often install them at that time. These are often in pairs a foot or two apart to allow cleaning in both directions from the cleanout point.
Old 05-16-16, 10:44 AM
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I'm leaning towards foundation drain cleanouts, or downspout drains which were never used?

Are they 4" pipe? Solid plastic (like ABS), or pipe with ridges on it?

I would say no to radon, as it should be exhausted somewhere away from people, typically above the roofline.

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