really quick... I was looking at the fitting on the pool, and the valve to change between skimmer and main drain. I noticed that the fittings are or look like they can be 2 sizes. Currebtly and prior to new filter I has 1 1/4" hoses. The fittings that are on seem to be both 1 1/2" and 1 1/4". They look like step downs. Can I just cut the end off of the fitting and make it 1 1/2"?