Floor Drain mistake, and how to fix?

[mrbreeze71]

Question for the group. I had a 36x50 built last year, overall turned out great. I had a floor drain put in the cement floor and 4" corrugated pipe stubbed out the side of the building for me to run to a drainage area. To my surprise, I started to trench that in and I see that it is perforated. Perforated all of the way to the drain inside the building. I assume that should be solid pipe (non perforated corrugated). But, at this point, what's done is done. Any thoughts? I think that I can possibly slide a 3" solid PVC all of the way from the outside to the drain and seal that in. Looking for other thoughts or options. Can't really go back at this point, need to think about what to do going forward. Fact is, I'll rarely have water on the floor in there, so it may never be an issue, but if I can fix it right, I might as well.

 

[nadogail]

Sewer pipes can be relined, typically a sleeve is pulled into the pipe and expanded, after the pipe liner is expanded an epoxy is activated.

Call your local plumbing contractor for prices.

 

[wssix99]

4" corrugated pipe stubbed out the side of the building for me to run to a drainage area.

Are you sure corrugated pipe is all the way back to the drain, under the floor? I don't believe that stuff should be under a slab at all. (Perforated or not perforated.)

 

[mrbreeze71]

Are you sure corrugated pipe is all the way back to the drain, under the floor? I don't believe that stuff should be under a slab at all. (Perforated or not perforated.)

Yes it goes all of the way back to the drain

 

[dcg9381]

Ugh.. Someone screwed that up big time.

 

[larry4406]

Are you sure corrugated pipe is all the way back to the drain, under the floor? I don't believe that stuff should be under a slab at all. (Perforated or not perforated.)

The OP’s install is clearly botched.

That said perf 4” corrugated drainage pipe is used all the time under basement slabs. Granted I’ve not run it under a garage slab on grade.

 

[jack stand]

You say it shouldn't see a ton of water...
Your options are connected to a fat invoice so just go with it. Do you recall how deep it is below the bottom of the slab?
I think that for it to be a big concern you'd have to pour enough water in it to completely saturate the soil and once the immediate surrounding soil was saturated I'd estimate that the pipe would be the least restrictive path for the water to flow.

A wacky thought just popped into my head, bentonite clay. Possibly a way to seal the dirt outside of the slots by pouring in a loose slurry over a period of time? Maybe someone could expand on this thought.

 

[mrbreeze71]

Thanks for the thoughts. I'll have to get with the builder and sort it out. As I think about how it was installed... There was a vapor barrier over the sand, then the rebar and 4" of concrete. The drain is in the middle, through the vapor barrier (I think) with drain pipe below the concrete and exiting under the 2x8 grade board that runs around the perimeter of the building. How far under the slab I don't know. Probably not far at the drain, but maybe a couple inches where it exits it would appear. The building is 36' wide, so like I said initially, I'm not sure why I couldn't run 20 feet of 3" PVC inside the 4" corrugated, assuming it is a straight shot from the exit to the drain, then just seal around the PVC in the drain somehow.

 

[The Cobbler]

very likely you won't get a 3" thru the drainage tile, any slight dip or bend will be the end of pushing for you
for the little bit of water you're expecting, I would consider 2" black poly flexible shoved thru and fitted to a drain .

 

[ez-duzit]

...I'll rarely have water on the floor in there...

I would run a flexible hose inside the perforated pipe and adapt it to a/the drain fitting. Once outside you can do what you want with it.

 

[Leaflessshadetree]

Are the holes facing up or down? If facing up I wouldn't be as concerned.

 

[The Cobbler]

^^^the holes are likely all around the circumference

 

[CraigStu]

I would definitely try the 3 inch PVC. If it doesn't go, heck you have some pipe on hand. My concern w/ any flexible hose is every one I have seen came off of a roll. And it still has a memorized curve to it. So the end of it is going to be tight against the inside of your corrugated pipe which I think will jam it not too far in.

 

[mrbreeze71]

Thanks y'all for the tips. Sounds like part of my weekend agenda.

 

[yatg]

Run a pull rope through it so you can pull/push whatever you feed in.