Plumbing under slab?

I would recommend hammer drilling a few holes to see if there is a void under the slab. Unless you are in sinkhole or high plasticity clay area it is probably something leaking and washing soil out from under the slab.
 
If only the toilet isn't working, and the belly in the pipe is small enough that it's not piling up with toilet paper and poop, I'd be checking that vent or working on the toilet, not ripping my floors up.
 
grumpy356 said:
All with engineered slabs. :idea::idea::idea:

I’ve also seen slabs crack
1950s-1980 home construction.
Scrape dirt, form & pour. That’s shit construction, and hasn’t been standard in over 20 years I can personally attest to.
(although I have to admit, that’s kind of what some of the post tension set ups look like to me.) That is exactly what was described in other posts and what I was referring to
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The OP's slab or sewer lines have no indication on any engineering or anything else actually other than maybe code required slope for water flow. It would be humorous but welcomed if he simply has a blocked vent line and there is some micro shit under his carpet :laughing: Toilet wont drain but tub does. Maybe pull the toilet up/out that's easy. Camera down that line also.

Grump. In your four slab builds in the south how did you lay your waste and vent lines ?
 
DirtDrill said:
I would recommend hammer drilling a few holes to see if there is a void under the slab. Unless you are in sinkhole or high plasticity clay area it is probably something leaking and washing soil out from under the slab.
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There is standing water in the low spot in his 4-inch line so it seems to not be leaking, at least there. What do you think ?
 
Splib said:
The OP's slab or sewer lines have no indication on any engineering or anything else actually other than maybe code required slope for water flow. It would be humorous but welcomed if he simply has a blocked vent line and there is some micro shit under his carpet :laughing: Toilet wont drain but tub does. Maybe pull the toilet up/out that's easy. Camera down that line also.

Grump. In your four slab builds in the south how did you lay your waste and vent lines ?
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I forgot the exact slope. I always have to look it up. 1/2” per foot?
Not so much the water runs away without the solid waste but enough so shit runs down hill.
 
I tis 1/4 to 1/2 inch per foot. I dont' recall seeing any UBC or IBC ( plumbing) for specifics on plumbing waste and vent lines below slabs. Anyone have the source ?

Edit: - there is ambiguity - bullshit - :lmao:

aspe.org

What Is the Minimum Burial Depth When Running Sanitary Lines Under a Building Slab? - ASPE Pipeline

Recently on the ASPE Connect Open Forum, Andrew Saggese, a Mechanical Engineer with Emtec Consulting Engineers in Ronkonkoma, New York, said that he gets conflicting information from plumbing contractors about the minimum pipe cover when calculating inverts under building slabs for sanitary PVC...
aspe.org

"Both the 2015 International Plumbing Code (IPC) Section 306.3: Backfilling and the 2012 Uniform Plumbing Code (UPC) UPC Section 314.4: Excavations call for the minimum backfill above the top of the piping to be 12 inches. However, the commentary for the 2018 IPC has the following statement concerning minimum ground cover for piping:

“It is not the intent of this section to require that all piping be buried with at least 12 inches (305 mm) of cover. Sections 305.4 and 305.4.1 indicate the required burial depths for some types of piping systems. Piping in trenches under a slab-on-ground building need not be buried any more than what is necessary to provide for a full thickness of the concrete slab above.”

Noice. Wahtever the fuck that translates to in simple English - Clear as mud.:flipoff2:
 
Drummer79 said:
If only the toilet isn't working, and the belly in the pipe is small enough that it's not piling up with toilet paper and poop, I'd be checking that vent or working on the toilet, not ripping my floors up.
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This. My toilet did the same thing. I blocked off all the drains I could and blew the toilet drain with a shop vac and it blew trash out of the vent. Been working fine for 3 years now.
 
Splib said:
The OP's slab or sewer lines have no indication on any engineering or anything else actually other than maybe code required slope for water flow. It would be humorous but welcomed if he simply has a blocked vent line and there is some micro shit under his carpet :laughing: Toilet wont drain but tub does. Maybe pull the toilet up/out that's easy. Camera down that line also.

Grump. In your four slab builds in the south how did you lay your waste and vent lines ?
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I would gladly be called a dumbass if that was the case. Just the water standing 4” deep in the main drain pipe with both clean outs open. Dont see how it could be a vent problem from a line coming into it.
I will pull the toilet before I rip up the carpet in the bedroom.
 
He's right ya know !! :flipoff2:

You can always hope for the best. Curious as to how this develops. Good luck. My shit is all new so of course I am all proud and shit but give it 20 years like yours. :eek:

I set my toilet pipe carefully and had to glue the cap on to seal it for pressure test it . . . .. . . I didn't re check before the concrete pour and I was all giddy as my weekend warrior shit passed hydrostatic and visual state inspection. Came back to the poured beautiful slab and my toilet waste pipe was 2 1/2 inches high sticking out like a boner in 7th grade music class. :laughing:
 
Splib said:
There is standing water in the low spot in his 4-inch line so it seems to not be leaking, at least there. What do you think ?
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Could be water lines, could be a sewer line that was just holding water at that elevation, could be any leak really. Some small hammer drilled holes are minimally invasive and will tell you if you have a void under slab. almost always an isolated slab settlement/void is due to utility leak of some kind in my experience.
 
Well the septic system is like a fat girl at closing time. It aint what I wanted but it will work for now.
Finally figured out how to make the camera turn up incoming lines. There was a blockage in the toilet line just before the main drain. Pulled out a damn ace bandage, nobody knows anything about it. Lol
It still has the low spot in the 4” line but its flushing now. Took a few measurements at both clean outs and at the toilet drain when I pulled it. Not much drop from one clean out to the other. Right at 90’ of 4” line according to the camera system. Even at 1/8” it should be almost a foot of drop. Im only seeing around 6-8” but really hard to get an accurate measurement. May have been like this for years but just never noticed it until it stopped completely up.
 

2021 INTERNATIONAL PLUMBING CODE (IPC) | ICC DIGITAL CODES

ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures.
codes.iccsafe.org codes.iccsafe.org

Basiclly we use; 3" and below 1/4" per ft, 4" to 8" 1/8" per ft, 8" and above 1/16" so on your pocket torpedo level it is quarter bubble to breaking bubble, never flat.

I have worked in different States and different regions within States, Local Governing Authorities have the right to interpetation of codes and to modify them to use the materials at hand.

Normally you would dig a trench, compact the subgrade and then place 6" to 8" of bedding whether that is sand, sand / gravel mix or gravel underneath the pipe, along both sides (wider the better) and 12" to 24" on top to provide a trench encasement, with select fill topping out the ditch. Around here we try for min of 2ft of cover on the select fill, dosen't always work out on long runs. We use sand here because it is plentiful.

In short, The Code is not the same Everywhere, at lest not in Plumbing.

Not unusual to find piping with backfall (low spots / high spots) that was installed that way from day one and just had to be rodded out every now and then. The issue is when you have cast iron piping or heavy usage, only you can decide when its a problem worth addressing.
 
jeeptj19992001 said:
Where is here?
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Mississippi in the county. At the time I built all you really needed was a soil perk test. No permits for anything else.
They did tighten up some a year or two ago on contractors. Just supposed to be a licensed contractor to build a house for somebody. Cant remember how it was worded. Cities tend to be a little stricter with permits. They just want their piece of the pie.
 
grumpy356 said:
:lmao::lmao::lmao::lmao:
Ok… sure.
:lmao::lmao::lmao:
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Thats why you can stumble into a mess as a buyer of a home/house. The State of Mississippi doesn't follow UBC for building ? Like a specification standard stud wall with 2x4 on 16 inch for simple residential load walls ? Really ? Nailing patterns in same ? Or with wiring ? :eek:

mm6, are you going to go all out and lift the carpet now where in crack might be in the slab ?
 
In the county you could build pretty much what you wanted to. Couple of contractor friends said the state did make some new requirements. Something about the homeowner having no recourse if they hired the shadetree carpenter to build instead of the licensed contractor. Licensed contractor screws up you can file suit but joe blow gets away with it. Not sure how all that went.
As long as the toilet flushes and the bathtub drains im going to let it ride for a while.
Wanting to figure exactly what the elevation drop from one clean out to the other is. Not real sure how to go about doing it. I measured it counting the bricks in the wall and trying to guesstimate where floor level is. But if the house isnt level that wont be right.
Gonna watch it fir a while and make a solid plan on how to fix it if needed. I dont like surprises.
 
Splib said:
Thats why you can stumble into a mess as a buyer of a home/house. The State of Mississippi doesn't follow UBC for building ? Like a specification standard stud wall with 2x4 on 16 inch for simple residential load walls ? Really ? Nailing patterns in same ? Or with wiring ? :eek:

mm6, are you going to go all out and lift the carpet now where in crack might be in the slab ?
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It’s never the state that requires the code. It's the bank.

You think the bank is loaning money to build houses not in code?
The BANK sends out the inspectors, not the state.
 
Bank came out and looked at mine twice during the entire build. First time was for a large draw to make sure we were where we said we were and the 2nd time was when we got ready to close. Now this was 22+ years ago.
 

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grumpy356 said:
It’s never the state that requires the code. It's the bank.

You think the bank is loaning money to build houses not in code?
The BANK sends out the inspectors, not the state.
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No. Not true. But, also true. :flipoff2: To get a permit and pass inspection, has to meet code. Bank probably wont finance a new build structure that is not up to code or it may make some exception. But the state sets the standard. Let's re-phrase that. The county requires the build to follow state code that follows UBC etc. :jester:
 
Fuck. sirched state of MS webpage. Code, Electrical, plumbing, etc term not found. So I wuz wrong. :eek:

I cant fathom or believe this. :lmao:
 
Socsmm6 said:
.
Wanting to figure exactly what the elevation drop from one clean out to the other is. Not real sure how to go about doing it. I measured it counting the bricks in the wall and trying to guesstimate where floor level is. But if the house isnt level that wont be right.
Gonna watch it fir a while and make a solid plan on how to fix it if needed. I dont like surprises.
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486/ Water level! /486



It's actually pretty badass
 
grumpy356 said:
I forgot the exact slope. I always have to look it up. 1/2” per foot?
Not so much the water runs away without the solid waste but enough so shit runs down hill.
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1 to 4... 1" slope in 4ft. Mostly so the water drags the shit along vs it clogging the pipe.
 
Splib said:
Fuck. sirched state of MS webpage. Code, Electrical, plumbing, etc term not found. So I wuz wrong. :eek:

I cant fathom or believe this. :lmao:
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I did the electrical on my house, laid the tile and ended up finishing the plumbing after I fired the dickhead plumber. An electrician showed me how to wire up one room. Rinse and repeat. He did come back and tie everything in at the breaker box. Never done anything like that before. State didnt care and the bank didnt ask. Lol
I remember the light company came out to hook up my temporary meter. Something was wrong with the way it was done. It had to be fixed by an electrician. Guy said he was going to lunch and would be back in an hour. Your electrician should have it done by then. Yes sir he sure will. Lol
 
Socsmm6 said:
I did the electrical on my house, laid the tile and ended up finishing the plumbing after I fired the dickhead plumber. An electrician showed me how to wire up one room. Rinse and repeat. He did come back and tie everything in at the breaker box. Never done anything like that before. State didnt care and the bank didnt ask. Lol
I remember the light company came out to hook up my temporary meter. Something was wrong with the way it was done. It had to be fixed by an electrician. Guy said he was going to lunch and would be back in an hour. Your electrician should have it done by then. Yes sir he sure will. Lol
Click to expand...

That's how I did ( am still doing) my build albeit with three visits from the licensed electrician to keep all on course. It helps that the State inspector trained as an apprentice and used to work under my electrician. He did the panel and the 60 amp work. :idea: Buzz Buzz !! Had a licensed plumbing contractor do the pex and tankless wiring also. The County inspector has been out twice free of charge to make suggestions and is available almost any M-F 7-4:30 over the counter to answer questions. But even in dirt road BFE Idaho, code and inspection and approval is required by law or your structure isn't insurable and I have no clue about how they value it to collect property tax. That's why I was surprised that Mississippi web page didn't mention following code . . .. . . Wow. There is even a sign entering the county that Lemhi is a "code county" and "building permits required". I bet you are relieved to find that ACE bandage in your waste line :flipoff2:

I know a lot of people here on this board feel the oversight and inspection is onerous but it is also to protect the general public from half ass shit that will back up, stink, breed vermin, spark, smoke, burn down or just collapse in a thunderstorm micro burst. People cant see past their own self importance to when they might be forced to sell or yield their little piece of heaven and someone else, say woman and child, are sold on it by some truly righteous piece of work realtor :laughing: and unknowingly purchase their concealed disaster.

Glad you got your shit together. :flipoff2::flipoff2::flipoff2:
 
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