Charlotte Pipe3 x 3 x 1 1/2 DWV SANITARY TEE REDUC DWV (DRAIN, WASTE AND VENT) (1 Unit Piece)

The product description says 4"x4"x1.5", and the side of the pipe says 4", but the inner dimensions are too big for a 4" pipe.Unfortunately I didn't realize this until after smearing it with PVC primer and cement.I'm in a bind, so I will fill the gap with silicon and hope it holds until I can find a replacement.