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Discuss Best way to cap cast iron soil pipe in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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mfgs

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I have got to remove a toilet and cap off the cast iron waste. It is half buried on a concrete floor so not easy to cut, how do you normally go about capping or plugging these. All I can think of using would be a 4 inch bung like used to testing?
 

jtsplumbing

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Do you need to use the drain again ? if not bung some newspaper down and seal with sand/cement.
 
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gasmanrob

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Fernco collar with a roding eye in the other end?
 
M

mfgs

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Do you need to use the drain again ? if not bung some newspaper down and seal with sand/cement.

It is in a branch off of the main stack so cant risk trying that, its just the way its half buried in the concrete floor tight to a wall which makes it a real pig.

Rob, that's not a bad idea. They are wanting to build some cupboards in place of where the toilet was so may be a bit bulky. Trying to keep it as tight as possible.
 

kozak1968

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I think ensign do an internal plug
 
C

chris watkins

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Good god just got out of the way of em stampeded horses, there must be Indians around these parts !!!!

If there is any chance of the stack blocking & the removed connection being put under pressure I would want to be using something that is going to stay in place & remain water tight.

Either a 100mm Timesaver or Ensign coupling (GT01) with a Blank end (GT70) cap, is the proper way to do it, IMHO.

At a push I am with Kozak above, they do a proper internal plug but you only need about 25mm of plan pipe showing to get the coupling on the outside.

[DLMURL]http://www.saint-gobain-pam.co.uk/assets/docs/sdr/Timesaver_Manual_2012.pdf[/DLMURL]
 
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kirkgas

If you can't get something on the outside of the pipe a multikwik pan connector with a 110mm PVC plug in the end that usually goes over the pan spigot may be shorter and will allow rodding access, if you can get something over the pipe then a timesaver bolted coupling with the PVC plug
 

brum

Plumber
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684
I would go with 4inch bung as used on drain tests as you suggested pushed in as far as practical and faced up with sand & cement
 
C

chris watkins

Esteemed
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Just don't say I did not warn you!!!, if the drain blocks & the stack fills with water the drain test plugs (bung) or drain connectors will not take the pressure & are likely to come out causing a flood.

If your name is on the work there will be a claim against you & insurance are un-likely to cover damages as inappropriate fitting have been used.

Ask yourself, is it worth the risk & they are going to be paying for the material & labour costs aren't they???
 
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