A downwardly extending non linear pathway from the drainage openings to the exterior of the diverter prevents {HEAD ~ water} from entering {TAIL ~ the wall interior} through the channels 
A downwardly extending non linear pathway from the drainage openings to the exterior of the diverter prevents { HEAD ~ water } from entering { TAIL ~ the wall interior } through the channels
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH