A dispensing apparatus (20; 300; 400) comprises: a freezing cylinder (40); a water flowpath (526); a first controllable valve (130) along the water flowpath; a syrup flowpath (528), merging with the water flowpath and proceeding as a water/syrup flowpath (552) to the freezing cylinder; and a second controllable valve (132) along the syrup flowpath. The first controllable valve and the second controllable valve each comprise: a valve body (144; 432) having a cartridge compartment (164,166), an inlet (176) to the cartridge compartment, and an outlet (178) from the cartridge compartment; and a valve cartridge (162). The valve cartridge comprises: a cartridge body (200) mounted in the cartridge compartment; a valve element (222) carried by the cartridge body and shiftable between a first condition permitting communication between the inlet and the outlet and a second condition blocking communication between the inlet and the outlet; and a solenoid (224) carried by the cartridge body and coupled to the valve element to drive movement of the valve element.