I-PVC yaNgaphandle yoNcango olusecaleni kwefestile/Isigqubuthelo sefestile kukubuyisela isamente, umgca wesamente, kunye nesigqubuthelo sefestile yebhastile, sisetyenziswa njengesigqubuthelo sefestile esikufutshane kwibhodi ejingayo.Ukuba isiciko sefestile sihonjiswe ngezinye izinto, nceda ungayihoyi le nto kwaye usebenzise umtya owenziwe ngu-J ukuvala umda.