I picked up a couple of these fitting reducers, and they both seem to be out of variance with reg...I picked up a couple of these fitting reducers, and they both seem to be out of variance with regard to inner diameter, making it near impossible to get onto the pipe on either side. Comparing the sizing to the other couplings and elbows that I purchased that fit perfectly, I can only assume that the problem is with the reducers and tees from Nibco.
by Gopherr