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:-) Time goes fast, that was like yesterday....The 8x8 is getting the same treatment and already had the switching setup for dual tanks (truck tractor). The valves of the 8x8 installation is getting more attention to eliminate any pressure drop (high Cv value) experienced with the deuce and the...

Thanks for that info! Know about the 6-way valves, some are motorized and will not return to a default position if power is lost. Also, I need to be able to control the return flow separately to "purge" the lines after switching the pumps. My fuel density monitor tells me that it takes 75...

To compare notes, which brand/model solenoid and check valves are you using? I use SMC direct acting (no pilots) valves and Circle Seal check valves. Will try to find two good 3-way valves to replace the four individual ones later to upgrade the system. The check valves are okay, but if neither...

Nice job Gerhard! Do the external fuel pumps have built-in back flow preventors? I'm not ready to try 100% VO without reducing the viscosity, not sure about the spec for the IP, which may be damaged if the viscosity is too high. Normally the VO should be heated to 180-200 degF and even then it's...