IF you are talking front to back, the swing arm should pull slightly from the wall. If you are talking height from the trap to the swing arm you may have to trim a little off the tailpiece and refit the trap to it.
The problem is that the trap doesn't reach the pipe coming out of the wall where it turns down, shown in the second photo. The pipe out of the wall is fixed with no play, so I'm shy about 1/2" - the trap coming can't reach far enough back toward the wall.
There's a nut holding that swing arm to your drain adapter. It may take some exploratory surgery, but I would gain access to the area behind the cabinet and loosen it to where it comes out, replace it with a PVC arm and re do it.
I cut back some more of the drywall. Looks like it's definitely not threaded.
Is it possible to leave this in place and use an adapter of some kind to come off of it and out half an inch into the direction of the front of the cabinet, even if it means going over to the side and down and around or something?
If not, I wonder if I'll be forced to use a hacksaw to cut back the chrome pipe out of the wall and use a Fernco meant for tubular drain?
FlexTRAP Expandable and Flexible P-Trap features an accordion-like design that accommodates lengths from 3-1/2 in. to 6 in. for space constrained installations. Bends, compresses and expands for alignment
I saw a waste arm joint like that in saint louis. Some kind of lead or steel putty packing around the thin metal joint to cast iron. the thin plated metal is probably deteriorated in that cast iron so if you tug 1/2" out of the cast it will expose the rot and start leaking. Maybe. That arm will move if you wrench on it but will probably crumble.
Look for a double offset for the trap extension. Or pull the arm out and get a longer pvc replacement and cut to fit.
Anyone have luck heating pvc with hairdryer and bending a double offset?
One is chrome plated brass and is longer and 3x the price, and is 1 1/4", the other is plastic and is shorter, and is 1 1/2" with 1 1/4" reducing washers included in the package. The pipe out of the wall is chrome plated brass, but I would like to use a plastic tailpiece and trap.
I did email Oatey customer support, they quickly got back to me saying the plastic 1 1/2" 46WK repair coupling should work fine on 1 1/4" tubular drains on both sides, and that the direction of flow doesn't matter, that it has two reducing washers I would use. But the 669 would of course also work with 1 1/4" without any reduction.
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