Gas ball valve o se ituaiga valve, faʻatasi ai ma se mamanu faʻapitoa e mafai ona sili atu ona faʻafetaui i le siosiomaga galue o paipa kesi.E masani ona faʻaaogaina i le faʻasalalauina o kesi ma faiga faʻatonutonu.
O lo'o taua i lalo le fa'amatalaga o oloa ma le fa'aogaina o va'a polo kesi