Changing pool filter housing

May 5, 2015
5
las vegas
My pool is 24 years old. The pool filter housing has been leaking and I am about to replace it (too many broken components). I bought the new housing and am getting ready to switch them out. Do I need to change out the pipes or the unions? The housing is the newest version of the older housing so the inlet/outlet openings are the same as far as size, height, etc.
Just wondering if I would need to change out the unions.