I am completing a bar unit which is using an existing drain waste system. I have seen a thin walled brass drain pipe at my local plumbing store and would like to use this but when I have tested it I cannot get a good seal and continually get small leaks.

The pipe has a threaded collar at one end and seems to have a compression fitting at the other (small nylon collar).

Does this need to have a flange? The compression end always seems to be loose and will simple slide out if pushed and won't make a tight seal like I have made with copper supply lines that have compression fittings.

Thanks

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Originally Posted by simetz

I am completing a bar unit which is using an existing drain waste system. I have seen a thin walled brass drain pipe at my local plumbing store and would like to use this but when I have tested it I cannot get a good seal and continually get small leaks.

The pipe has a threaded collar at one end and seems to have a compression fitting at the other (small nylon collar).

Does this need to have a flange? The compression end always seems to be loose and will simple slide out if pushed and won't make a tight seal like I have made with copper supply lines that have compression fittings.

Thanks

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Since you haven't specified what the brass tail piece is going to be connected to and its size and the material I can't help much. I don't have the details I need to make a recommendation. You're making me guess but if I had to I guess here goes. The brass tailpiece is 1 1/4" connecting to a 1 1/2" PVC "P" trap. If that's the case you have the wrong size nylon compression washer. You are trying to make a 1 1/2" washer work where you should be using a 1 1/2" X 1/14" washer to make your connection. Did I guess right?? Cheers, Tom
Regards, Tom