Valiant tanks
Agree with the above, after a glorious time on 214 Sqd Valiant tankers & then a session in Honington's fuel tank bay remember the only thing in the rubber bag tanks (spent many happy hours fitting tanks popping the buttons into holes that didn't exist only to find the tank was out of line !!!) other than the pumps were the "sacrificial anodes" in nylon bags to corode rather than the tank equipment, also maybe the previous Valiant people may remember the outbreak of "cladisporia resinae", a strange fungus that grew in the tanks, eventually found to be from a poor fuel uplift somewhere in the Far East, we spent many hours defueling the Valiants ( & Victors at Marham & Honington) & going inside the tanks to inspect & clean & treat the tanks, believe a fuel additive (Alcor ?) was added to the bowsers to combat the problem, & regarding pressurising the Valiant underwing tanks with nitrogen who could forget early morning "BF's" pulling the trolleys to the tank, filling them (1,500 psi regulated ?), then opening the valve to allow nitrogen in to the tank only for the valve to stick & having to go down the back of the pylon , bang the vent area to try & close the valve, not always successfull , so back up the front & do it all over again until it worked, oh happy days, lovely aircraft the Valiant as an engine fitter but quite hated by the electricians, Paul H.