Hey guys! I think this might be my first post. It's good to be here. Well, let's get down to business. I have a leak under my kitchen sink. There is a little 'black locking ring' that like tightens around the piece of PVC as it comes out of the base of the sink. Here is an image of it.
Well, the smaller of those two black rings has a deep crack in it. So it doesn't create a seal and the water leaks out of it. I have a bucket underneath that pipe, although the photograph doesn't show it. My question is, what is the name of that 'black locking-ring' that tightens around the PVC? I want to go to Home Depot and pick up a new one but, I'm not sure what the part is called. Any ideas?