I'm replacing the p trap behind a pedestal sink. Where the drain enters the wall there is a bronze or brass 90 degree elbow with 1 3/8" ID. I found a length of 1 3/8 OD copper pipe. How do I go from the 1 3/8 copper pipe to 1 1/4" P trap? A simple reducer? The rubber connector with 2 gear clamps?
FWIW it looks like previously the 1 1/4 was stuffed into the 1 3/8 - chrome p trap so it couldn't have been soldered.
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