Line locks are no good to set and walk away for any length of time.
Is that something you read or personal experience? I've accidentally left my line lock on a few times for weeks at a time and it's still had pressure every time.
Line locks are no good to set and walk away for any length of time.
Is that something you read or personal experience? I've accidentally left my line lock on a few times for weeks at a time and it's still had pressure every time.
I can answer that.
It's right there in the instructions that come from the manufacture.
Probably has more to do with liability on their part but it's enough to make you second guess buying one.

I wouldn't spend the time looking at 1/4 turn valves at the hardware store. You want to look here: http://www.highpressure.com/
or here: http://www.autoclave.com/index.html
Your typical hardware store valve isn't capable of surviving, much less holding, the pressures generated in brake systems.