sweet looking stuff! hey did you put ball valves after the sqwd, bc sometimes the sqwd clog and you have to clean them and if you only have a ball valve after the pump, you can't just take off the sqwd.
Johnny,
I decided to do something different here. I put a tee coming off the discharge side of the closed-loop pump and installed an elbow and another ball valve with a barbed fitting. Basically whenever I want to drain the suction or discharge side of the closed loop I just open the respective side's valve on the pump that I want to drain and open the drain line coming off the tee from the pump discharge. If you look at the pic you can see what I'm talking about.
Should work out well when I want to drain the system.
ReefJ