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Posted by Don Young on January 4, 2007, 9:54 pm
> Basement or ground floor slab?
> What is the existing finish on the concrete? Carpet, tile, exposed
> concrete??? It makes some difference on how you break the hole and how
> you repair the hole.
> How do you know where the pipe is? So you can hope to be over it with
> your hole.
> How are you planning to cut the cast iron? Chain cutter (ratcheting or
> lever handle), gasoline Quickee type saw, Sawzall with a grit edge blade
> (very slow)? Each choice makes a huge difference on how big the hole
> needs to be.
>
> The pipe you are after may be as much as 2 feet or more down under the
> slab.
> The slab will be about 4" thick. It may have WWF (remesh), rebar, or post
> tension cables, or nothing.
> It is very possible to just swing a sledge hammer and break through the
> floor, once you have a hole it is actually quite easy to keep breaking out
> the edges of the hole to make it bigger. You really want to have a pretty
> good idea where the pipe is.
> IMHO you will be best off planning to tie in plastic fittings using Fernco
> type connectors. If it is 4" pipe you will be removing a foot or more of
> the existing pipe (fitting with nipple on each end). You do not weld cast
> iron pipe, you do not solder cast iron. The very fact that you are asking
> suggests that maybe you should break the hole and hire a plumber to make
> any and all connections, you will probably time and money ahead in the
> long run. Cutting cast iron is not usually for the DIY type.
>
> ~~~~~~~~~~~~~~~~~~~~
> DanG
> A live Singing Valentine quartet,
> a sophisticated and elegant way to say I LOVE YOU!
> valentine@okchorale.org (local)
> http://www.singingvalentines.com/ (national)
>
>
>>I have a drain pipe that is under the slab in the house , the house was
>> built in 1960, I want to connect another service to run to the
>> apartment just built, the old pipe is inside the slab and I need to
>> connect into it , it's that old Cast metal , and I want to put a T
>> connection so I can have a access to snake out the system, 1 how should
>> I get to the old pipe in the slab , by saw or just drill holes and chip
>> from around it slowly to gain access , and how should the connection of
>> the T be made, welding, soder , of with a boot and sleeve.
>>
>>
>> Thanks ctops
>>
>
>
Be careful or you may break the cast iron pipe while trying to break the
concrete, particularly if it should be imbedded in the concrete.
Don Young
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