50 foot channel drain, 2 1/4", drain is all one piece (but in sections -- just no removable top piece). Was clogged as heck, decided to cut enough room to get a pressure washer down into it, but it was clogged up so many times on this 50 feet run, that I decided in the end I just want to replace it with something with a removable top.
Easy enough to cut off the top -- problem is the way this was built way back when, I can't see how I can easily rip this out due to the little grooves in the PVC where it locks into the concrete. I've grabbed my vice grips, tried cutting the bottom, etc -- no real luck yet.

If I did want to replace it with something like this:

That only has one groove, so I imagine I'd have to find a way to grind this channel down to remove that extra lower concrete bump.
Thoughts?
Easy enough to cut off the top -- problem is the way this was built way back when, I can't see how I can easily rip this out due to the little grooves in the PVC where it locks into the concrete. I've grabbed my vice grips, tried cutting the bottom, etc -- no real luck yet.

If I did want to replace it with something like this:

That only has one groove, so I imagine I'd have to find a way to grind this channel down to remove that extra lower concrete bump.
Thoughts?