This is probably a straightforward question, so apologies but I'm new to reticulation so I'm not sure where to start.
It looks like someone has driven over a part of the reticulation and as a result there is a crack (pictured). I can see a Ratchet Clamp holding two of the pipes together but I'm not sure what the part that's actually broken is called and therefore how to replace it. The bit that is cracked seems to be attached to a circular black disc beneath it, but again I'm also not sure what that is and if that also needs to be replaced.
Thanks for your advice

