After flowing through Siôn-Sieffre's Reservoir it turns south through Tredegar and then Blackwood and Pontllanfraith.
ˈæftɚ flˈoʊɪŋ θɹuː sɪˈɑːnsˈiːfɚz ɹˈɛzɚvwˌɑːɹ ɪt tˈɜːnz sˈaʊθ θɹuː tɹˈɛdɛɡɚ ænd ðˈɛn blˈækwʊd ænd pˈɔntlɐnfɹˌeɪθ.