Heya folks, I have a massive irrigation project underway in my backyard (big for me). I have built (2) 4-zone manifolds. I built one zone using DVF-100s (all black from pro shop) and another using CPF-100s from Lowes (both horizontal valves). I read the comparisons of each of these valves on the website and even took pictures of the valves to show people later. They are almost exactly the same exact the Lowes valves are gray-colored tops. I have between 60 and 65 PSI for water pressure static, down to 40 or 45 in use. The DVF-100s are holding the pressure and not leaking. The CPF-100s are leaking badly, as in a slow trickle out of the valve. I played around with the adjustments and nothing helps. What is going on here? Thanks in advance!