mudbeast66 wrote:what is the easiest way to take the head off the unit? how can i make sure there is not any pressure in the system before i open it? I wanted to check the resin level to see if i should add any. there are no tags, how can i tell if it has a carbon filter?
There only one way, it unscrews out of the tank.
To release pressure you shut off the water before the softener, not with the by pass valve, and open a faucet in the house. Let the faucet drain and then close it.
How do you know how much resin is in that size softener, and then if you'd need to add any? Most resin tanks are never filled, the empty space is called freeboard and needed for successful backwashing. The freeboard space is usually equal to half the resin bed depth or more.
A carbon filter? There is no carbon filter in a softener but, there may be some carbon in a softener on top of the resin. It is not a good idea though and is called top dressing.
People should not buy/use old softeners or filters unless they know they 'work', or how to replace whatever needs to be replaced without proper instructions of how to do it, and that the thing is the correct size for their water quality, family size and the numbers of bathrooms and the type of fixture in those bathrooms.