Removing L-shaped elbow underneath a kitchen sink

kitchen-sink

I'd like to remove the L-shaped elbow that appears in the figure below.

underneath kitchen-sink

I'm able to twist by hand only the lower of the two rings locking the L-shaped elbow in place.

  1. Is it safe to seek a tool to disassemble with a bit more torque?
  2. What is the name of this black ring and/or the tool that would be used to turn it. Notice there are two extra-large projecting tabs that would be broken if an ordinary wrench is used to grip.

I'm assuming that the sluggishness is due to blockage in this (left) side since there are two sides and the flow in the other side is swift.

Best Answer

The nut on the left is threading down onto the black elbow, you need to know this in order to turn it the correct direction. If you think that it is threading up onto the white one then you would be turning it the wrong way and tightening it.

Put your channel lock pliers on the nut so the handles are to the left and move the pliers handles to the right, this should loosen the nut.