3/16" with minimal slope

[Paul VT]

Paul, where are you getting 13 inches of vacuum? At the last tap before the tank, or somewhere above that on the line?

The gauge is at the top of the line. From the last tap to the tank is only 5 ft of drop and the top tap to the tank is maybe 10 feet.

[n8hutch]

I have a run of 3/16 that doesn't have a whole lot of slope, maybe 1/8 inch per foot for 200' and then drops 10-12' after the last tap. The only time I have checked it & it wasn't running it was well below freezing, it has never stopped otherwise. Very happy with it so far. Going to put the Vac gauge on it tomorrow to see what I am actually getting. It has 17 taps on it

[sugarsand]

You may actually have more drop than you think, or possibly faulty gauges.

sugarsand