Brass P-Trap to Copper sewer line

[Smythers]

Hi all,

I'm repairing a kitchen sink p-trap that had a soldering job that completely failed all around the joint. I just pulled the 1-1/2" brass p-trap out of the 1-1/2" copper sewer pipe 45 degree elbow by hand. That copper elbow has a solder elbow for the p-trap to mate into, but when I was cleaning it up, I noticed that there was a piece of old copper pipe still left in that solder elbow. I guess the last person was trying to soldered the brass pipe to that old end piece.

I thought I had it made... just unsoldered that extra piece of pipe, clean up the elbow and solder the brass pipe back where it should be, no worries right?

Wrong.

I've measured the brass pipe diameter and it's 1-1/2". Same with the copper sewer line is the same. But when I fit the brass pipe in the copper elbow, there's a (relatively) HUGE gap. Too big to just fill with solder, I could almost fit a matchstick in there. So I must be missing something here.

How do I bridge this gap properly?

Thanks.

 

[Jadnashua]

Tubular fittings and drainage pipe are different. Tubular fittings are designed to be used with a tapered seal and a nut to compress around the tubular pipe. So, to make that connection, you may need to solder a tubular trap adapter https://www.homedepot.com/p/Everbilt-1-1-2-in-Copper-DWV-C-x-SJ-Trap-Adapter-C9017HD112/204620387

 

[Sponsor]

 

[Smythers]

Now I know what to look for.

Thanks so much.