fixit5561 said:
Hi John,
Thanks for the quick reply, I have both check valves on each side and did modify it to the 3/8" line too.
Check your check valves. Hasa's may come DOA new from the box or get biderectional with time. Mine did. I advise you to check rabbit's 3/8" line conversion post and to order the check valves from US Plastic.
If the control valve is indeed closed and gives 0 flow and the check valves work as they should, I don't see how the LQ can supply FC to the system. Zero feed means zero gain.