I bought a seal pack/brine piston replacement kit from Culligan in Santa Ana, California: 502 S Lyon St., Santa Ana, CA. 92701, the direct phone number is: 714-953-6300. I paid $149.77 this included $10.77 tax. Javier has been working here for over 40 years, he has been very helpful, he even showed me how to replace it. 2 years ago I brought my tank to have the brine filled. But I have a problem, I cannot pulled the entire assembly out, the front part with the pin and piston came out, the rest got stuck, can I loosen the back and push it through the back?