sink drain pipe in basement


  #1  
Old 05-28-04, 08:33 AM
cdleeman
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sink drain pipe in basement

I need to tap into my existing 1 1/2" cast iron drain in my basement to run a pvc drain pipe for a sink. I've read before about needing to melt and pour hot metal to seal the drain connection, etc.

Is all this necessary or can I just open up the existing cast iron drain and simply run a pvc drain pipe into it?

Also, anyone have links about the proper procedure?
 
  #2  
Old 05-29-04, 04:02 AM
Mike Swearingen's Avatar
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The answer to both of your questions is no.
Cut a section out of the cast iron drain pipe (reciprocating saw with metal-cutting blade) and use a 1.5" PVC street T connected on both ends with no-hub couplings to the cast iron. Turn the T up.
You will need a 1.5" to 1.25" PVC adapter between the drain assembly and PVC pipe.
How is this vented? Distance? Or are you going to use an air admittance valve?
Good Luck!
Mike
 
  #3  
Old 06-01-04, 08:09 AM
cdleeman
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vent

I actually have no idea how I'll vent it yet. I wasn't even sure if I would have to...

The drian pipe I'm tapping into comes out of the floor less than a foot, and has a cap on it. There is an existing cast iron pipe running right alongside it, which is used as the main drain for the house. The two pipes are actually touching, so I'm not sure I can saw off the top of the lower pipe without affecting the other one.
 
  #4  
Old 06-01-04, 08:21 AM
Mike Swearingen's Avatar
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That drain pipe with the cap sounds like a roughed-in basement drain for a sink. It won't have a trap, but it should already be vented (although not necessarily).
Good Luck!
Mike
 
 

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