Tu'u le penstock lapotopoto

O lenei valve e faia i le fa'avaa, faitoto'a, ta'iala ta'iala, fa'amaufa'ailoga fa'amau ma fa'amaufa'ailoga fetu'una'i.Sa i ai uiga nei: fausaga faigofie, faʻamaufaʻailoga lelei, sili atu le faʻafefeteina, faigofie ona faʻapipiʻi ma faʻagaoioia, auaunaga faigaluega umi ma faʻaoga lautele ma isi.

O le valve o loʻo faʻaaogaina lautele i pulega faʻapitonuʻu, faʻasao vai, togafitiga faʻamaʻi ma isi. E mafai ona faʻaogaina e le tusi lesona, eletise ma le pneumatic.O le fesoʻotaʻiga pito e iai le ituaiga puipui, ituaiga flange ma le ituaiga paipa.