yep I already have a valve on the output side of the pump to control flow. my worry is that going from 1/2 inch diameter tubing down to 1/4 inch tubing the back pressure will increase above the bursting pressure which happens to be at 70 Degrees...what is the busting pressure at say 200 degrees? After looking at the hose specs again the hose I got, 3/4 OD, has a bust of 30 PSI at 70 Deg F. even if there is a 20 percent drop due to heat and hose expansion that would make burst pressure at roughly 24 PSI. I guess I will just try it out with water prior to running wort through it. I will post results when I get the experiment complete.