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Hey Phil: can you take this thread all the way out? If I had just looked at my existing setup, I had all the answers right there. It is a NPT Fitting on the tank, barbed, for hose; followed by the fuel demand valve, followed by more hose, terminating in a female two prong. All that is different in my new setup will be a longer hose. I am duplicating the existing setup entirely, including the demand valve, which is important given these new expanding/contracting fuel tanks.