I have a Circupool salt system and have had it about 5 years. Bought a replacement cell for it last year so I can change it out while I clean out the other one. When I changed it this year to start the season one of the union nuts got tight then slipped and was loose again. I got new unions from the pool shop and was going to change them but the nuts feel loos on the threads also. The alignment might be off a little. Would it be safe to install some flex hose on one side to help with the alignment? Or any other suggestions?