I'm replacing my 2HP Whisperflow Pool Pump. The piping is currently solvent welded at the intake and outlet so I have to cut the pvc pipes to remove the pump. Is there any problem using those threaded couplers ( the ones with the o-ring inside) at the inlet/oulet so if I ever have to remove the new pump I can do so easily.

Is there any downside (other than the cost of the fittings) to using these couplers?