89 the balls 84 shift inwardly and release the tube 82 for downward movement so that the pivot support 26 for the handle 24 is released and the fuel flow control valve 22 returns to its normally closed position in response to the force exerted by the spring 31 referring to fig6 a second venturi suction passage or port 160 connects the fuel passage 142 to a suction port defined by a small tube 163 which extends from the seat member 112 radially outwardly through the annular chamber 153 and through a boss portion 166 of the nozzle body 12 a vapor valve plate 168 fig6 is secured to the boss portion 166 by a set of screws 171 fig4 and 6 and defines a suction or evacuation port 172 fig8 forming an extension of the port within the tube 163 a deformable or flexible plastic evacuation tube 175 fig4 and 8 extends rearwardly from the cover plate 168 through the vapor passage 55 within the nozzle body 12 and connects the port 172 to a suction or evacuation passage 178 fig2 defined within a flexible evacuation tube 180 as shown in fig1 and 2 the inner end portion of the tube 180 extends into a recess within the tubular portion 57 and is secured to the nozzle body 12 by an arcuate retainer or holder 182 which is swagged to the tube and is secured to the body by a pair of screws 183 as also shown in fig2 the flexible evacuation tube 180.