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      08-16-2018, 11:49 AM   #23
Maynard
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To me, that looks just like they plumbed direct drain lines under the slab and into your existing floor drain; and from the looks of that drain filter, it has been seeing a bit of water over time (also a shortcut to be just pressed into the cement and not directly screwed into the drain pipe). That floor drain should have a trap to keep sewer gas out - if not your basement will reek (it has never been subtle in my experiences). Since this all has the look of some pretty iffy 'engineering' I would definitely have a plumber or contractor give it a lookover to be sure everything is OK. Main concern would be that they might have done a worse shortcut and just run the drain pipe down into the dirt or scree under the foundation, with no real outlet line. Over time this can eat away foundation, and it will let in a lot of Radon if you have that in your area. If you can put a straight rod down that hole more than a foot or two w/o hitting a bend, I'd be suspicious of this.

In our old house we had floor drains like this, and they would dry up enough to dry out the trap, and let sewer gas in - the solution was to either pour some water down regularly (doesn't take much - about a liter) or you can buy special oil that will seal the water-surface and keep it from evaporating (I bet you could use a few ounces of cooking oil too, but we just put water down it every 6 months).
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