o 39 clock and 12 o 39 clock positions about the sidewalls of valve 102 valve 102 is preferably enclosed within an insulating jacket 104 having inlet and outlet ports 104 a and 104 b for respectively introducing hot water from the engine cooling system into jacket 104 and for returning the hot water to the engine cooling system the hot water flowing through jacket 104 maintains asphalt emulsion passing through valve 102 in a heated flowable condition to prevent clogging of the valve 102 when valve 102 is moved to the position coupling 12 o 39 clock port 102 a to common port 102 b heated asphalt from tank 20 passes through valve 102 and enters asphalt line 106 which is one of the lines that is enclosed within the hollow insulated non collapsible hose 44 shown in fig2 b a valve assembly preferably a one half inch 0 50 u2033 ball valve assembly 108 is connected in line 106 and is operated under the control of a custom linear actuator 109 operated under control of an actuator switch 111 located in the patcher cab 14 to provide an adjustable flow rate of the asphalt emulsion through line 106 line 106 is split by a t coupler 110 providing a first branch.