Remove the chlorinator and replace with PVC. You either have a small crack in the coupler, or are leaking back through a poor seal. Hard to say, but there's no need for a chlorinator anyway. It'd be best to remove it completely.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!