For newer technicians on the job, here are a couple of HVAC service tips about leak testing and evacuating after repairing a system. The best way I've found to leak test a system is to pressurize it ...

Have you ever inspected your vehicle's engine compartment and noticed that your engine has a couple of oil slicks on the ground next to it? A vacuum leak can be caused by just about anything from a ...

Bipolar plates – the backbone of proton exchange membrane (PEM) hydrogen fuel cell stacks – have become somewhat of a leak test problem for manufacturers in the fuel cell field. Considering the ...