the dispersion line 12 through the use of a locking mechanism or line impinging section 57 as seen in fig5 referring to both fig3 and 5 the line through ports 28 are configured to accept the chosen dispersion line diameters 44 through a reduced through port line opening 42 the through port 28 has a thickened section which is configured as a port collar 66 the port collar 66 has an increased radial collar depth 74 as seen in fig4 and an increased circumferential wall thickness 75 to provide for strengthening of the impinging action 56 which will be discussed further below the port collar 66 as well as the rest of the orifice shield 20 is constructed of a rigid but elastic material such as a polyvinyl chloride or even a nonyielding elastic composite material or metal alloy material the through port 28 having the line impinging section 57 locks onto the dispersion line 12 when the orifice shield 20 is pressed downward through an installation force 100 xxxxxxxx by the installer over the dispersion line outer diameter 44 the port collar 66 flexes circumferentially outwards a flex distance 102 which is the difference between the impinging section edge 59 and the outer diameter edge 61 of the dispersion line 12 after the orifice shield 20 has been installed over the dispersion line 12 the port collar 66 will apply a tangential pinching force action 56 as seen in fig3 against the outer surface of the line the elastic spring force of the port collar 66 working to return to its original position is one way to provide a secure locking mechanism onto the dispersion line.