+2
I have 2 unions on mine (a 4), first running 10" of reinforced 1" hose from the pump to a union, then hard lined it to the back of the bulkhead for a second union. Should be a breeze to clean the pipes out now if my flow starts to lag. I did a similar thing on the siphon line of my Bean.
The inability to clean out my lines was a point of consternation once my first system got to be around a year old. Never again.