Don't you mean 1 1/2", or 1.5", not 1 1/5"?

Generally Intex uses 1 1/4" fittings which makes mating up with 1.5" a pain. However, there's a plumber's gizmo for fixing broken PVC that looks like a short radiator hose that comes in changing sizes (like 1.5" on one end and 1.25" on the other.).

Carl