House settled on pipe and broke it

Help Support Plumbing Forums:

JewishBacon

Member
Joined
Jan 28, 2019
Messages
15
Reaction score
0
Location
Maryland
After doing some digging in regards to my last post, I found the crack in my slab foundation leads right to a cast iron pipe from my kitchen sink ( that does not hook up to the rest of the septic plumbing). The pipe has a crack exterior to the foundation and water rushes out of it when I use the sink. What is the easiest way to patch/replace this?
 

Attachments

geoffhazel

Well-Known Member
Joined
Jan 7, 2011
Messages
47
Reaction score
3
Location
Seatle, WA
If water is rushing out of that crack when you use the sink, I'm a little suspicious of what's IN the pipe that may be blocking it from draining properly. Does the crack go all the way around he circumference of the line? If so then perhaps that's just what happens, but if it's a hole on the top, I suspect some clogging. As far as repair goes - it's possible (but slow) to cut cast iron with a hacksaw or sawzall and then patch it with some PVC and fernco no-hub couplings.
 

voletl

Well-Known Member
Joined
Dec 17, 2014
Messages
800
Reaction score
249
Location
New York
They sell special cast iron sawzall blades

Do not use ferncos uses fully sheilded couplings
 

voletl

Well-Known Member
Joined
Dec 17, 2014
Messages
800
Reaction score
249
Location
New York
Exactly what I said...

Any homeowner or novice is going to walk into Home Depot go down the plumbing aisle see fernco as in this POS.

Where you should be using a fully shielded coupling like in this other picture.
Those crappy fernco couplings will dip will move left and right will not fully support the pipe.

I also understand that fernco makes fully shielded couplings but when people refer to a fernco coupling the Home Depot special is the one people go for

If you need any other explanation just let me knowScreenshot_20190517-180140.jpegScreenshot_20190517-180236.jpeg
 

frodo

Just call me Macgyver
Professional
Supporting Member
Joined
Sep 28, 2014
Messages
8,120
Reaction score
2,576
Location
right here right now, over there later on.
RUT ROHHHH

OK..Here is what ya gotta do.
FIRST
Clean the top of the old pipe, Then set a level on the CLEAN pipe
if it shows fall in the correct direction. then you are good to proceed to the next step
Next step
Use a saws all with a bi metal blade and cut the damaged section out
You can use the fernco, That is pictured above as NOT LEGAL to use
IT IS legal to use underground in the horizontal position, It is NOT LEGAL to use above ground

after you have cut the pipe, dig out and discard, ALL saturated wet soil, this will get rid of disease and the funk smell, replace with SAND

OK
IF the level shows that your house has indeed settled and the pipe does not have fall
You gots some tunneling to do.
Start digging back to the sink. NOT towards the sewer
dig back and check with a level. till you find the belly in the pipe
cut out from belly to the bad spot. and replace
dig out all wet dirt, replace with sand

WHY SAND?
sand self compacts if you wet it. you can get 95--100% compaction with sand with out compacting

you DO want the soil under your house compacted, or face slab cracks and shifting
 
Last edited:

Diehard

Well-Known Member
Joined
Aug 19, 2017
Messages
2,640
Reaction score
469
Location
North Reading, Mass.
Exactly what I said...

Any homeowner or novice is going to walk into Home Depot go down the plumbing aisle see fernco as in this POS.

Where you should be using a fully shielded coupling like in this other picture.
Those crappy fernco couplings will dip will move left and right will not fully support the pipe.

I also understand that fernco makes fully shielded couplings but when people refer to a fernco coupling the Home Depot special is the one people go for

If you need any other explanation just let me knowView attachment 20835View attachment 20836
Sorry, it sounds like you took offense to the fact that I couldn't understand exactly what you meant. It may be perfectly clear to you as you know what you were thinking.

No offense as I was thinking Fernco DOES make a shielded coupling.

So I guess what you're saying is people will automatically use a Home Depot special that is not shielded.:confused:
I think just saying, be sure to use a shielded coupling would have been understood better.

Again, sorry if I ruffled your feathers. That was not the intention. Just clarification.
 

Jim Jensen

Member
Joined
Feb 1, 2019
Messages
18
Reaction score
1
Location
Jacksonville, FL
THANKS for this thread, I have a similar issue, adding a cleanout to 4" ci, just as it comes out from under pier and beam house, and will go to local plumbing supply house (Ferguson) and get fully-shielded 4" coupling, instead of the cheapy small shielded one I had gotten from Home Depot --- only has 2 hose clamps, and is only about 3" long....not nearly as beefy as the one in the pic above.
 

frodo

Just call me Macgyver
Professional
Supporting Member
Joined
Sep 28, 2014
Messages
8,120
Reaction score
2,576
Location
right here right now, over there later on.
Exactly what I said...

Any homeowner or novice is going to walk into Home Depot go down the plumbing aisle see fernco as in this POS.

Where you should be using a fully shielded coupling like in this other picture.
Those crappy fernco couplings will dip will move left and right will not fully support the pipe.

I also understand that fernco makes fully shielded couplings but when people refer to a fernco coupling the Home Depot special is the one people go for

If you need any other explanation just let me knowView attachment 20835View attachment 20836
Voletl
those pos fernco's are legal when used under the ground in the horizontal position
they are not legal above ground, because of the problems that you stated
The reason is that a pipe is [in theory] 100% supported underground and therefore can not move.
if you look in the IPC under drains, it references a ASTM number . if you go down the rabbit hole after that number. It says it is legal
My problem with using a shielded coupling underground is the debth of the coupling is 1''
I am not liking that, altho I do use them underground and seal them with some black swan
no hub sealer, that crap is so sticky you have to ruin the rubber to get it off.
WHY the damn code references a astm # instead of just coming out with the info is beyond me, but that is fodder for a different discussion
 

voletl

Well-Known Member
Joined
Dec 17, 2014
Messages
800
Reaction score
249
Location
New York
Anything I put underground that needs a coupling it gets a husky to tell you the truth any coupling I use is a husky
 
Top