Inserting a sanitary tee into existing stack that will not move

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denikar

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I'm investigating how to insert a sanitary tee into an existing vertical 3" stack that will not budge at all (vertically). One of the discussions I found here suggested cementing the lower part of the santee and using a fernco fitting for the top part. Is this the recommended method or are there better alternate methods?

Thanks,

Tim
 

Terry

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Normally it takes two of these

mission_bandseal.jpg


Notice the stainless steel wrap that prevents the pipe from shifting?
 

hj

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If it does not move, there is no way you could "cement the bottom and use a transition coupling on the top", because you would have to cut out enough pipe to angle the Y in, then slide it down, and then whatever you are using would be too short to fill the gap.
 

denikar

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To clarify, the cut stack can be moved enough in the x-y direction, just not up and down (z direction).
 
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Hey, wait a minute.

This is awkward, but...

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