I did check it with a 15 psi pressure gage last fall (right before I shut the system down for the winter) and now it has been so long I forget what it was, but it was within a couple tenths of what our calculations said it should be. I figured that was within the range of accuracy of what the gage probably was and/or the depth measurement of the water from the top of the diffuser.
Last edited by snrub; 01/21/14 11:01 AM.
