Kuyika papaipi yapansi panthaka kumapangidwa ndi chitsulo chopukutidwa ndikulumikiza mpweya woponderezedwa kwambiri ndi payipi ya nthunzi ku kulumikizana kwachimuna kwa NPT. Ili ndi mapeto aminga kuti apange chisindikizo cholimba pa payipi ikagwiritsidwa ntchito ndi payipi ya payipi kapena manja a crimp kapena ferrule (osaphatikizidwa) ndi ulusi wachikazi wa National Pipe Taper (NPT) kumbali inayo kuti ugwirizane ndi maulumikizidwe aamuna a NPT. Kuyika uku kumapangidwa ndi chitsulo chopukutidwa kuti chikhale champhamvu, chosasunthika, ductility, ndi kukana dzimbiri, ndipo chimakhala ndi mpando wa polima wotsutsa mankhwala. Izi za Boss ground joint full seal hose fittting zimalimbikitsidwa kuti zigwiritsidwe ntchito pa nthunzi mpaka madigiri 450 F.