All Jinniu pipes and fittings have product registered trademark logos, with the icons of cow and Pinyin Jinniu painted on them.

Check whether the appearance of the pipes and fittings is uniform in color, free of burrs, whether the cuts are neat, whether the design size of the fittings is balanced and reasonable, and whether the printing is clear or not. Check whether the outer surface and inner wall of the pipe fittings are smooth and smooth, whether the lines are neat, and whether they have texture. When weighing pipe fittings of the same specifications, especially copper inserts, if they feel heavy when weighed by hand, they are products from regular manufacturers. Compared with pipes and fittings of the same specification, the specific weight, specific wall thickness, specific homogeneity and specific shape are better.