fittings that don't fit
I went to Big Orange and bought a length of L gauge 1/2" copper, a bag of Nibco 1/2 elbows and a bag of 1/2 couplings. As hard as I try, I cannot get the couplings to dry-fit onto the pipe, but the elbows are fine. All are acclimated to room temp, to rule that out. Is this a common problem and should I be buying from a plumbing supply instead? Thanks much.