I have a Technetics 1000 water softener with an autotrol valve. The name plate says model 1000. I have visited various sites and cannot find this model number anywhere. I want to do operators maint on it but I am afraid I won't be able to get parts. I also am changing the resin bed since it is exhausted. I have the resin. How can I take the valve off the tank to replace the resin. Thanks. Richard