In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I have a solar tube system with a PAW pump station on it is a WILO 3 speed pump and a flow meter, my question is how do I determine the right flow rate to adjust the circulator to correspond to my system? I live in Northern New England with the circ on slowest speed this time of year I don't worry of overheating in the collector but in July maybe different. I am a master plumber.