I am currently replacing my old sand filter with a Pentair cartridge filter and replacing the existing filter pump with an Intelliflo. I am taking this opportunity to rework the piping for my equipment, as it is real mess. I also have a PB4-60 Polaris booster pump.
In the Polaris pump manual, it shows the preferred orientation of the piping to have a "horizontal leg" coming off the tee, that goes into an elbow that goes down to the inground filter pump return line, as per the attached. Is there a reason/need for the "horizontal leg"? In my new piping plans I would have this exact configuration, except that the center leg of the tee goes straight down into the underground return line. My Polaris feed line comes off the tee exactly as shown in the diagram.
In the Polaris pump manual, it shows the preferred orientation of the piping to have a "horizontal leg" coming off the tee, that goes into an elbow that goes down to the inground filter pump return line, as per the attached. Is there a reason/need for the "horizontal leg"? In my new piping plans I would have this exact configuration, except that the center leg of the tee goes straight down into the underground return line. My Polaris feed line comes off the tee exactly as shown in the diagram.