A cikin saitunan masana'antu, musamman a wurare masu haɗari, sarrafa manyan hanyoyin zirga-zirgar kebul ko hadaddun ya zama damuwa mai mahimmanci. Lokacin da tsayin shimfidar kebul mai tabbatar da fashewa ya kai wani matsayi, ko kuma lokacin da haɗin gwiwa ya bambanta saboda yawancin juyi da karkatarwa, Tsarin magudanan ruwa na gargajiya na iya tabbatar da rashin isassu. Wannan shine inda akwatin mahaɗar fashewa ya zama mahimmanci.
Akwatin mahaɗa yana aiki azaman cibiya mai mahimmanci a tsakiyar kebul ɗin gudu, sauƙaƙe sauye-sauye mai sauƙi da ingantaccen sarrafa kebul. Babban aikinsa shi ne tabbatar da aminci da amintaccen haɗin kai inda hanyoyin kebul ko dai sun yi nisa mai nisa ko kuma su rabu zuwa kwatance daban-daban.. Amfani da an akwatin junction-hujja a cikin irin wannan yanayin ba kawai yana sauƙaƙe tsarin cabling ba har ma yana kiyaye ƙa'idodin aminci da ake buƙata a cikin mahalli masu fashewa., tabbatar da amincin tsarin lantarki ana kiyaye shi a kowane lokaci.