“Not only is this a multiple-function device, but it (I think) provided me some freeze protection. The plastic cap blew off, causing water to gush, but it saved the system.”
“Seems to work as advertised. Instructions have errors: the lock knob is at the bottom of the adjustment knob, not on top. Direction figures are reversed.”
“I have installed several of these. A+ so far. No problems. Set pressure just under 30 to bleed it. Then set it back to your normal pressure. Very simple to work.”
