Ok, so I am trying to drain a community spa. I found the line to the sewer and the valve to open to drain it, but when I open the valve (a Praher) Nothing happens. Is there something special about making these work? Here is a picture of the type of valve. Does it indicate a broken valve? They have this special "pin" feature for repairing the ball valve pin removal. What the heck is that about? [attachment=2:33039eho]truesingpin.jpg[/attachment:33039eho]
As well the dang pump controller monitors mm of Hg on the vacuum side, so when I shut off the skimmer and switch to the drains only it freaks out because of the pressure increase from 3.5 to 5.8. How do I keep the pump running and stop the controller from interferring. I am sure it is a safety feature for all the new anti entrapment features.