Separate sewage cleanout PVC that has been cemented

[Magicalpig]

I discovered a hole in my front lawn where my sewage cleanout cap used to be. It seems the cap fell apart and down into the sewage line. There is a female adapter on the top of the 4" PVC pipe that runs straight down to the sewage line. This adapter has also started to fall apart to the point where a new cap will not seal over the hole completely.

I believe the setup consists of a 4" vertical pipe with a female threaded adapter slipped over the top of the pipe. My plan is to dig below the adapter, pull it off and then replace it by slipping a new one over the pipe. But then I remembered about cement. I assume the adapter has been joined to the pipe with cement.

Is it going to be possible for me to undo this joint if it has in fact been cemented? Maybe by applying heat some how?

If not I suppose I'll have to dig down even further so I can cut the pipe below the adapter with a hack saw , but now my cleanout cap would be underground.

Can anyone offer some advice here?
Thank you

 

[Reach4]

There is more than one size of 4 inch PVC pipe. If this is 4.500 inch OD, that would be schedule 40. Schedule 40 ID would be 4.026.

There are also smaller OD sizes.

Removing a glued fitting from schedule 40 pipe is possible, but that takes a special tool and skill. Digging down may be easier.

 

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[Magicalpig]

Digging down may be easier.

I'm concerned that if I go any lower the cap will be below grade (it had been flush with lawn). I suppose I'll have to add more pipe to make up the lost height and then join my adapter to that new pipe? This is putting the concerns about OD variations aside for the sake of argument.

Thank you

 

[Reach4]

I'm concerned that if I go any lower the cap will be below grade (it had been flush with lawn). I suppose I'll have to add more pipe to make up the lost height and then join my adapter to that new pipe? This is putting the concerns about OD variations aside for the sake of argument.

Suppose you dig down 12 inches, glue on a coupling, and glue a pipe into the coupling... The pipe would be whatever length you need to set the level..

I would put the cleanout at grade. I would take measurement notes to help me find it later. I painted mine instead of leaving it white.

 

[Magicalpig]

Suppose you dig down 12 inches, glue on a coupling, and glue a pipe into the coupling... The pipe would be whatever length you need to set the level..

I would put the cleanout at grade. I would take measurement notes to help me find it later. I painted mine instead of leaving it white.

Do you know if they make a female adapter that goes into a 4" pipe rather than around it? In other words , the non-threaded end would have an OD equal to or smaller than the ID of the pipe?

 

[Reach4]

This is exactly what you asked for if you have schedule 40, but does not elevate things:

https://www.supplyhouse.com/Sioux-Chief-875-4P-4-Cleanout-Bushing-w-Plug

These would give some elevation:

If schedule 40 https://www.pvcfittingsonline.com/c...ucts/4-schedule-40-pvc-pipe-extender-s0301-40 gives a top that is the same size as a 4 inch schedule 40 pipe. So you could glue a hub onto that.

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Remember to measure your pipe before making plans.

 

[Magicalpig]

Beautiful! Thank you.