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I-hydrants yokujonga i-valve zizinto ezibalulekileyo kwiinkqubo ezininzi zeshishini, ngakumbi kwizicelo zokulawula ulwelo. Ezi hydrants zenzelwe ukuvumela ulwelo ukuba luqhubeke kwicala elinye ngelixa kuyithintela ukuba ingabuye umva, ngokuqinisekisa ukusebenza okufanelekileyo kwenkqubo yonke. Ukuqonda oomatshini kunye nezibonelelo ze-check valve hydrants kunokunceda amashishini ukuphucula ukusebenza kwawo kunye ne-mainta