1 2 inch national pipe thread a washer 62 is accommodated in a shallow recess 64 surrounding the hole 60 as best seen in fig5 the adapter block 42 is also provided with a soda inlet 66 and a syrup inlet 68 the soda inlet is a blind cylindrical hole in the back of adapter block 42 this can also be seen in fig2 the soda inlet 66 accommodate the soda delivery tube end fitting 28 and cooperates with o ring 38 to seal the end of the soda delivery tube 22 thus soda water delivered through the soda tube 22 to the water station 40 is stopped in the blind soda inlet 66 the syrup inlet 68 accommodates the syrup delivery tube end fittings 26 the o ring 38 seals this joint providing a water tight connection the syrup inlet 68 however is not blind rather as seen in fig3 and 5 it communicates with the threaded hole 60 allowing delivery of fluid to the spigot central bore 48 the adapter block 42 is fixed to the face plate 18 by means of four machine screws 70 the adapter block 42 is formed from a dimensionally stable material such as delrin plastic while a metal block could be used delrin plastic is easily formed into the finished shape needed and provides sufficient strength screw holes 72 in the adapter block 42 are positioned so that the machine screws 70 mate with tapped hole 74 in the face plate 18 these holes 74 in the face plate 18 are standardized to accept mounting screws for standardized dispensing valve.