View Full Version : Extra holes in valves

Lynn Alexander
11-24-2011, 11:17 PM
I have recently seen some small holes drilled in the bottom portion of the valves. Have any of you seen this and/or what is the purpose and does it work?

11-25-2011, 09:49 AM
Those holes are to "vent" the valve. It allows the slide to quickly return to the closed position without resistance.

You'll want to make sure any vented valve has a stop on the slide, as there isn't vacuum to hold the slide in/on.