How/Where to Install chlorinator

[Poconos]

Inline chlorinators are not bad. You just have to know when to use them. When I need to add CYA I switch to trichlor and throw pucks in mine. Otherwise it just sits empty. The vertical rise on your heater outlet should be enough to keep high level chlorinated water from backing up to the heater. Install the chlorinator as far from the heater as possible. Check valves can be problematic and add additional restriction which you don't want.
Edit: Don't know if you're used to working with PVC but it's easy and cheap so practice first. Getting a straight cut back there can be a little difficult and a reciprocating saw make it easier.
Al