[Walt Fricke]

Tony - do the standard fittings on the usual pressure gauge systems fit the connection on the return line? I didn't know that.

Since the return to the tank just dumps fuel to atmospheric pressure, shouldn't there be basically zero pressure with the valve open (return flowing)? Do you really need to try to connect up by the fuel tank, with the possibilities of fuel pouring out?

How often is the return line itself clogged? I'm hard put to see just how something big enough to obstruct a line could get into it.

The WUR has a filter on its exit side - a bunch of tiny drilled holes in the casting itself, it looked like. When that got obstructed on my WUR, control pressure equaled system pressure, which was a tip off for sure of a problem.

Easy enough to clean if you disassemble the WUR. Could that be a possible explanation for the quite high control pressure?