This way seems to do the same thing but doesnt require an extra T on the inlet side for the valve. Years ago, I had it set up kind of like your saying but had trouble with the valves wearing out and letting air escape into the pump... Thats why I've been needing something else. I even tried the heavy duty valves on the inlet side but still, they wore out on me. Do you not have that problem? Also, if the valve is direct to the 5/8" inlet of the pump, it wont completely blow out the pump, just the top half of the head.