Amaphampu angaphansi kwe-peripheral ayizinto ezibalulekile ezinhlobonhlobo zemishini yezimboni, kufaka phakathi kepha kungagcini ezinhlelweni zokwelashwa kwamanzi, izitshalo zokucubungula amakhemikhali, nemisebenzi yezimayini. Lawa maphampu enzelwe ukucwiliswa kuketshezi abampompa, ukuvumela ukusebenza kahle nokuthembeka ezindaweni ezahlukahlukene eziyinselele. Lapho kuziwa ekuthengeni inani elipheleleyo