Yog vim li cas rau qhov tawg ntawm qhov sib koom ua ke: Tej zaum nws yuav yog qhov kev txav ntawm qhov haum ua rau cov pob qij txha tawg. Qee qhov fittings txav tsis pom qhov chaw ntawm qhov sib koom ua ke, uas tuaj yeem ua rau tawg ntawm qhov sib koom ua ke. Qee zaum qee cov pob qij txha yuav tshwm dawb, uas yog qhov ua ntej rau kev tawg. Rau cov pob qij txha, nws yeej yog ib hom laceration. Thaum txav cov yeeb nkab fittings, nco ntsoov xyuam xim rau qhov kev ncua deb, saib xyuas txoj haujlwm ntawm qhov sib koom ua ke, thiab tsis txhob rub nws quab yuam. Txawm hais tias lub zog ntawm cov fittings yog qhov zoo, cov pob qij txha tsis tuaj yeem tiv taus xws li lub zog hnyav. Qhov cuam tshuam ntawm cov khoom nyob ib puag ncig yuav ncaj qha ua rau tawg ntawm cov yeeb nkab fittings. Yog tias qhov cuam tshuam ncaj qha tsis muaj zog, nws yuav muaj kev cuam tshuam me ntsis ntawm cov yeeb nkab fittings, tab sis nws yuav muaj kev cuam tshuam ntau dua rau cov pob qij txha. Cov pob qij txha yog txhua yam nkhaus, tsis ncaj. Tom qab kev cuam tshuam, nws yuav deform thiab ncaj qha ua rau tawg. Cov yeeb nkab fittings feem ntau tiv taus qhov kub thiab txias thiab yuav tsis cuam tshuam rau kev siv hauv huab cua txias heev. Tab sis muaj ib qho teeb meem, thiab qhov ntawd yog qhov tsis muaj kua. Yog tias cov kua dej khov, nquag thermal expansion thiab contraction yuav ua rau lub neej ua haujlwm luv. Thaum siv cov yeeb nkab fittings, peb yuav tsum tau ua tib zoo saib xyuas qhov kev sib koom ua ke kom siv tau zoo kom tsis txhob muaj qee yam kev puas tsuaj rau kev sib koom tes.
