1 1/4" PVC or 1 1/2" ABS for Kitchen Sink ?

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  #1  
Old 11-23-08, 08:38 AM
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1 1/4" PVC or 1 1/2" ABS for Kitchen Sink ?

I just had a new counter top and dual sink installed. I bought a new garbage disposal and drain flange for the other basin and need to hook everything up. I asked the guy at the home center to set me up with all the plumbing pipe I need. I have a 1.5" black ABS pipe coming out of the wall from the previous sink drain system. The guy gave me a bunch of 1.25" white PVC pipe, elbows, a trap and fittings and a rubber adapter with hose clamps on both ends to go from the 1.5" ABS drain pipe to the new 1.25" PVC. The old sink plumbing was all 1.5" ABS. I'm thinking this 1.25" PVC is more suited to plumbing a bathroom sink than a kitchen sink and disposal. Should I take it all back and buy the larger ABS or is this 1.25" PVC pipe adequate and the way they are doing things now ? Thanks
 
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Old 11-23-08, 11:20 AM
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Are the fittings marked 1 1/4 inch or are you measuring it to get that figure?Are these glue slip fittings or regular drainage parts made of PVC?

Basically 1 1/2 inch is always used for kitchen drains but depending on what you have may actually measure 1 1/4 or close to that.

If you were given 1 1/4 inch glue fittings you are right.Those would not be suitable for a kitchen drain.The basket,the disposal outlet etc are designed to mate to 1 1/2 drainage fitting and parts.Generally speaking you'd adapt from glue to that and you'd be adapting from 1 1/2 pipe or fittings.

I'm not mister plumber so maybe there's a reason why you were given 1 1/4 for ABS but I think you should be using 1 1/2.
 
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Old 11-23-08, 11:45 AM
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You can glue abs to pvc with the proper cement. Look for it at the big box store when you take back the stuff you didn't need. Don't ask for it, look for it. They will just give you the deer-in-the-headlights look.
 
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Old 11-23-08, 03:18 PM
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Originally Posted by chandler View Post
You can glue abs to pvc with the proper cement. Look for it at the big box store when you take back the stuff you didn't need. Don't ask for it, look for it. They will just give you the deer-in-the-headlights look.
Generally the can will refer to this as "Multi-purpose" and/or will list all the types of plastic it works with like "PVC,CPVC,ABS"
 
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