AFPR Question

[Yamahaulin]

I have an AFPR that as soon as you turn the car off bleeds all pressure back to the tank in less than 5 seconds. Every AFPR i'v ever worked with before held the pressure. Is This supposed to be this way or do I have a faulty AFPR?

 

[ist dwa]

Some hold it some don't, but to answer your question there is nothing wrong, I have had ones that held and other that didn't.