Thina (CNG) siphakela i-Threaded Reducing Cross. Zisetshenziselwa ukuxhuma iStripipe ukulawula, ukusabalalisa, noma ukuxhasa ipayipi ngosayizi noma izinkomba ezihlukile. Ngokuxhumeka kwe-groove, isikhathi sephrojekthi sigcinwa kakhulu ngokufakwa okusheshayo nokulungiswa okulula. Siphakela okufakwayo kwamapayipi okufakwa kohlelo lokulwa nomlilo.