Water not flowing once I put the trap part on the sink pipes, help?

[Diego]

I live in an apartment and I really would like to not call my landlord for this problem. Days ago the sink began to drain water very slowly, until yesterday it kinda stopped draining it. I tried lots of grease cleaners, removed all pipes and cleaned them and they dont seem like the problem. When I put water to the last pipe that goes into the wall (pic 1) it goes away fast, but when I put the trap part (pic 2, I think thats what it is, but I have only searched some hours online) and I put water it blocks. Even when I put it all together the water wont drain. It is a single sink and the pipes are also connected to the dishwasher.

 

[Reach4]

When I put water to the last pipe that goes into the wall (pic 1) it goes away fast, but when I put the trap part (pic 2, I think thats what it is, but I have only searched some hours online) and I put water it blocks.

I think you are saying that when you use hose C to insert water into A or B as a test, the water backs up, and spills into the orange tub. Is that correct?

 

[Sponsor]

 

[WorthFlorida]

Need to call the landlord. Nothing that you did is wrong and only proved that the block is in the wall or main drain somewhere.