Dave, Measure without the gasket. With the needle valve closed, it is 1.4" from the flange to the top of the float. With the float dropped, the measurement is 1.6". Also make sure the float is centered in the bowl anf that there is not a lot of slop in the hinge area. I made a little Al jig with those two dimensions on it, but calipers are easy to use also.
Edit: measurements should be done with the gasket in place.
Last edited by Bob McCarty on Tue Dec 25, 2012 3:47 pm, edited 1 time in total.