I recently bought into a new place. It's a fixer-upper, but before my wife and I start the work, we're living in it while we finalize our plans.
Our kitchen sink does not drain on its own. We either need to use a plunger to get airflow going or squeeze the pipe a couple of times (it's flexible rubber; which I've never seen before) to get it to drain. We declogged it with a liquid product a couple of times, and once we get airflow, it drains fine.
I was looking under it, and noticed that the sink drain and the waste outlet in the wall is at the same height, with a P trap between them.
Would this (lack of) height differential be preventing the sink from draining?
If so, what would be our options? We plan on moving the kitchen when we renovate but until then, we're kind of tired of water piling up in the sink.