Tub transfer-diverter valve with built-in vacuum breaker and back-flow preventer

A valve assembly comprising a main body housing having at least one fluid inlet and at least two fluid outlets, flow paths associated with each of the inlets and outlets, and passages connecting the inlets and associated flow paths to the outlets and associated flow paths, one such passage being open to atmosphere;

• a diverter valve for transferring flow from one inlet to one or another of the outlets and comprising a hand actuated diverter rod connected to a bicone washer biased in a first position whereby fluid flows from an inlet to a first outlet and the second outlet is closed and sealed, and on actuating the diverter rod, the bicone washer is moved to a second position where it is maintained by pressure of fluid flow from the inlet to the second outlet and the first outlet is closed and sealed, and flow thereto ceases;
• a back-flow preventer/vacuum breaker valve located in the inlet flow path and a connecting passage, and movable, in response to changes in fluid flow direction or atmospheric pressure, from a first position, whereby back-flow is prevented as the valve closes and seals the inlet flow path, and opens the connecting passage outlet to atmosphere, to a second position in response to fluid flow from the inlet, whereby the connecting passage outlet to atmosphere is closed and sealed against fluid flow, the valve being normally located in the first position and returnable thereto with changes in fluid flow pressure and direction or atmospheric pressure;
• the valve having a truncated cone shape with an upper flange, guide means on each valve end and sealing means at each end to engage valve seats at the upper and lower limits of the path of travel of the valve;
• a back-flow preventer valve located in the first outlet flow path movable from a first position in which the valve is normally biased, whereby the inlet flow path is closed and sealed against flow, to a second position in response to fluid flow from the inlet path, the valve being of spindle-like shape with a whorl-like base having guide means and sealing means associated with it, and upper valve seat means to engage the valve sealing means.