Review on Adapter Couplers Conditioners Refrigeration Service by Ryan Morrow

How Can Something So Simple Not Work? Well, that's how it was. I hooked them up to a pressure gauge/vacuum pump and neither of them sucked air through them. I had an old adapter and I tried it and it worked great. My guess is that the schrader valve (nipple) on one end is not being pushed by the opposite end of the gauge set. The sensor set is commercial so this is not a problem. I've already passed the refund period, so I guess I'll have to pay for this junk.