I recently put a double sink in my kitchen where a single sink use to be. The single sink drained without a problem for years. Once I hooked up the double sink the water drained very slow. I thought it was because I hadn't attached the dishwasher yet which would allow for the pipes to vent, but once I did that then the sink stopped draining all together. I am very doubtful that it is clogged as it drained fine up until changing the sink. That would be a huge coincidence. I will attach an image. Please any help is appreciated.
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