Purity fire water supply system PVK imaphatikiza kuphweka, kuchita bwino, komanso kutsika mtengo ndi zinthu zapamwamba monga kusintha kwa magetsi awiri. Zosankha zake zosunthika zapampu komanso tanki yothamanga ya diaphragm yokhalitsa imapangitsa kuti ikhale chisankho chabwino chowonetsetsa kuti madzi amoto amakhala odalirika komanso abwino m'malo osiyanasiyana.