Hikelok o loʻo i ai le tele o ituaiga o oloa, e aofia ai valve meafaigaluega ma mea faʻapipiʻi, oloa maualuga maualuga, oloa mama maualuga, vaʻavaʻa faʻagasologa, masini masini, faiga faʻataʻitaʻiga, faiga faʻapipiʻi muamua, masini faʻapipiʻi ma mea faigaluega meafaigaluega.
Hikelok alavai mamafa mamafa, faʻapipiʻi ma tubing ufiufi 20NV, 20F, 20CV, 20BV, 20RV ma 20 faʻasologa faʻapipiʻi ma tubing. O le mamafa galue e oʻo atu i le 2,000psig (1379 pa).
