How to identify the good or bad of the valve, without pressure test and instrument?
First, the appearance, two according to the standard to see flange thickness, outer circle, wall thickness and other dimensions are standard, 3 see details.
You can see what the material inside the valve ~ basically copper heart relatively durable, solid ~!
First, the appearance, two according to the standard to see flange thickness, outer circle, wall thickness and other dimensions are standard, 3 see details.
