Going against the flow under a home

By
Home Builder with Dry Rot and Water Damage www.tromlerconstruction.com Mobile - 916-765-5366 CSL#642819
https://activerain.com/droplet/4cjm

 

 

It is always fun to get under a home and check things out. Maybe it’s because many do not bother to look under a home that things go unquestioned. I recently came across this puzzler while looking at a different issue.

The arrow shows the flow of the main drain line, but the rest is a mystery.

The white PVC pipe is not usually found glue to the black ABS pipe; it went down through the plywood and is not known where it goes. The fitting that it is attached to is odd also. The way it is installed, with the arm facing down, forces anything running down the main pipe to flow into this smaller white pipe.

If it were intended to flow down, the black fitting is backward and should be at least the same size as the main pipe. Judging by the work done in the area, this is not an original plumbing job – it was changed. It is not even close to be a professional installation.

Since the home was a short sale and purchased as-is, the new owners may have to get this fixed in the future. I can see this being an area of clogging that will need attention if there is a high volume of use in the home.

I hope they call me, I’m real curious to see why this was done. Digging around for answers sounds like fun!

 

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Charles Buell
Charles Buell Inspections Inc. - Seattle, WA
Seattle Home Inspector

Tom that is too strange indeed.  Was there a sump pump around?

Feb 23, 2014 01:20 PM #1
Rainmaker
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Tom Arstingstall, General Contractor, Dry Rot, Water Damage Sacramento, El Dorado County - (916) 765-5366
Dry Rot and Water Damage www.tromlerconstruction.com Mobile - 916-765-5366 - Placerville, CA
General Contractor, Dry Rot and Water Damage

I was told that there was one but I didn't have a need to look for it. Hmmmm. If there is one and that is the connection, there could be some ugly backflowing Charles.

Feb 23, 2014 02:53 PM #2
Rainmaker
694,665
Clint Mckie
Desert Sun Home, commercial Inspections - Carlsbad, NM
Desert Sun Home, Comm. Inspection 1-575-706-5586

Hi Tom,

I wonder if it was a sump pump connection? There would be a check valve in place. Even so, it is installed incorrectly.

Have a nice day in Placerville.

Best, Clint McKie

Feb 23, 2014 07:21 PM #3
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Charles Buell
Charles Buell Inspections Inc. - Seattle, WA
Seattle Home Inspector

Tom, the sump (assuming it has a proper back flow valve---but perhaps a bad assumption given what else they have done) will keep that pipe full of water right up to the drain going out of the house so I suspect very little debris would end up in the vertical pipe.  It would likely just flow on by.  If this were not true the sump pump likely would have failed by now   That installation is one for the record books for sure.

Feb 23, 2014 09:47 PM #4
Rainer
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Randy Shamburger
Movement Mortgage - Greenville, SC
FHA, VA, USDA and Conventional Mortgage Expert

Wow, interesting situation, thanks for sharing.

Have a Big day,

Randy

Feb 24, 2014 03:38 AM #5
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Rainmaker
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Tom Arstingstall, General Contractor, Dry Rot, Water Damage Sacramento, El Dorado County - (916) 765-5366

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