Txhawm rau kom muaj kev nyab xeeb hauv qhov chaw tawg, Nws yog ib qho tseem ceeb uas kev teeb tsa siv cov kav hlau tuab.
Hauv txhua qhov kev sib tshuam, cov yeeb nkab fittings tsim nyog yuav tsum tau ua kom muaj kev ncaj ncees, thaum threaded pob qij txha yuav tsum ua raws li cov txheej txheem suav cov hniav. Ntxiv thiab, kev sib txuas ruaj khov ntawm cov kav dej yuav tsum tau tsim los ntawm cov xaim hauv av kom ntseeg tau tias muaj kev ruaj ntseg hluav taws xob zoo ib yam.