An gyara ƙwanƙolin ƙwanƙwasa a waje da haɗin gwiwar da aka tsare.Za su iya ƙarfafa matsa lamba wanda bututu ke ɗauka.Girman na iya zama daga DN50-DN300.Matsin lamba DN50-DN100 10 mashaya, DN150 -DN200 5bar, DN250-DN300 3bar.
An kera na'urorin haɗin gwiwa don haɗa bututun ƙarfe na ƙarfe da kayan aiki, bututun simintin ƙarfe da bututun filastik ko bututun tagulla. Abubuwan haɗin haɗin sun ƙunshi babban kayan haɗin gwal na elastomeric mai inganci wanda aka ajiye a cikin garkuwar ƙarfe na ƙarfe.
An kera na'urorin haɗin gwiwa waɗanda ba za su iya haɗa bututun ƙarfe na No-hub ba da kayan aiki, bututun ƙarfe da bututun filastik ko bututun tagulla.Couplings sun ƙunshi babban ingancin elastomeric fili gasket wanda aka ajiye a cikin garkuwar da baƙon ƙarfe.