yea i no it works that way sensai 
But what wanna know if its compatable with 2 pumps... anyone?? 
Yea it does work fine, better than 1 pump, BUT u will have tangling pipe issues using 2 pumps, into a y inlet - then a y outlet, if ur in a rush, it will be a right f about (plus u wont get a accurate temp bcos if one man turns his tap off , yours will rise) and for me, its just better buyin 2 to make sure. That way one on each back door, into each reel. Good luck