My chiller has a 1/4 horse compressor in it. I didn't realize I needed an external pump. I downloaded the instructions off the net. The directions show a pump pulling water directly from the sump and back into the return, like Mike said.
I drew up the T off the return line with a valve and the dump back into the sump.
Q- How will I know how much restriction to place on the return line? Maybe a 1/4 turn?
Steve, the CL is for flow. At 1ft of headloss my return pump is rated at 700gph and my circulation pump is rated 1,100gph.
