My kitchen drain sink is leaking from the strainer. The fiber washer is warped and the rubber washer is not snug against the underside of the sink. I think that's because the strainer down to the tailpiece are askew (bottom end slightly slanted to the left)(photo 1). I think the original installer (we bought the condo several years ago freshly renovated by a developer) deliberately did that to align the tailpiece with the tee and P trap which could not be centered with the sink hole without compromising insertion of the trap arm to the adapter-wall drain outlet pipe. It also looks like the original installer compensated for the misaligned tubes by liberally using pipe joint compound on every connection.
This (photo 2) is how the whole setup originally looked. The dishwasher drain hose is hooked up to the right sink tailpiece. The waste arm, from the right to the left sink, is not horizontally level. Is this acceptable? Every plumbing forum I've read mentions that the waste arm should be level.
I replaced the left sink strainer's rubber and fiber washers (and all the other washers) and aligned all the tubes. As expected, aligning everything (left sink) downwards from the strainer to the P trap resulted in the trap arm not lining up with the wall drain outlet (photo 3). Here's a close up of the trap arm end and the wall drain outlet (photo 4). I can't figure out what to do. There's no way to push things (slip nuts, tees, P trap) further up. The adapter-wall drain outlet pipe seems to be too high for our sink. It's a Blanco sink that's deeper than many home kitchen sinks I've seen.
Help please! Any suggestions? I was wondering if there's a tube (metal because all our plumbing is brass?) with a bend that can be attached to the wall drain outlet pipe adapter. That would have to be a double bend wouldn't it - 1 downward bend + 1 horizontal bend - for the tube to meet with the trap arm.
I have an additional question. Are there reasons for choosing which washers to go with for the slip nuts - rubber or polyethylene? The reason I'm asking is my local hardware only has poly washers (tailpiece and cone). When I removed the slip nuts, they all had rubber washers with beveled (lies against the inside of the nut) and flat sides (outward, side that meets the pipe). Should I be replacing them with rubber washers or can I replace them with poly cone washers?