previously discussed heated thermal break 24 is connected into fluid line 41 to provide a heating zone of sufficient temperature and length that facilitates controlled re melting of any solidified or semi solidified material heating device 56 extends along a portion of conduit 54 to provide heating that forms a temperature gradient as illustrated in fig2 between heat exchanger 22 and unheated section 58 activated molten liquid hot melt adhesive from heat exchanger 22 will migrate upstream into conduit 54 of thermal break 24 all the way through heated section 60 and into unheated section 58 the molten liquid hot melt adhesive will cool the further away it gets from heated section 60 and heating device 56 turning into a non molten and molten transitional state material the transitional state material will form into a plug having a diameter smaller than that of conduit 54 in unheated section 58 the pressure of pump 28 pushes the plug back towards heat exchanger 22 through heated section 60 heated thermal break 24 specifically heated section 60 allows the plug to move freely within fluid line 41 before entering heat exchanger 22 unheated section 58 provides a runway that allows the plug to more freely enter heated section 60 thus the lengths of unheated section 58 and heated section 60 the diameters of unheated section 58 and heated section 60.