I am replacing my old pump with a Pentair VF and was buying up elbows and other bits at Home Depot. But I couldn't find anything other than the drain rubber boots that adapts 1.5" to 2". But that looks way too flimsy. So I started looking online and found this type of rubber coupling:
Is this what I need to connect 1.5" copper to 2" PVC? Or would sweating on a threaded copper fitting to the old pipe the better way?
Where can I buy this type of rubber no-hub couplings locally?