I just purchased to the compupool system for 24K gallons and have a question about the pipes running to the salt cell. I have attached some pictures to help illustrate. The new cell needs to be mounted horizontal to the floor so I have to put together some new piping to make it fit. My question is about the portion of darker pipe at the bottom that says FLOW on it, do I need that or was that something specific to the pilot system? Any help would be appreciated and please let me know if my question didn't make any sense.