Adjust Pressures at the wall NOT at the gun
Smallest hole will be inside diameter of Hi flow quick disconnects.
Yes harbor fright El cheapo Air deal does have a 1/4 pipe outlet but I also said Modify it!
Remove the Regulator assembly I drilled and Tapped mine. for larger fittings.
I assumed you understood what Modification may consist of???
a quarter inch pipe still has a fairly large inside diameter bigger than your Air hose Hi flow fittings.
I was ably to drill and tap mine for Half inch pipe. Still larger than my smallest air hose fitting.
Drilling and Tapping things running a Threading Die all part of the mechanic game as about a million other things.
There are also a million other things you could buy to do the same job my harbor fright offer was by no means your only alternative its just a cheap one, and i did say Modify it.
I have had to repair or modify just about every thing I have ever bought at that store they sell CHEAP JUNK!
I will be making a Air expansion tank/Water trap out of this in near future.https://www.harborfreight.com/5-gallon- ... 65594.html
I will be welding Bungs to it and attaching air fittings to each end and a Water drain on the bottom. Sometimes you just have to make what you need. Like I said a small air tank is better for a water trap as you want a Place wear the air can briefly expand a little. Air cools when it expands.https://www.youtube.com/watch?v=6S88XeA6fbM
Even though the air is under pressure as it flows through a tank it hits the tank and expands ever so slightly even if its under pressure and it cools. as it cools the water condenses
This rapid decompression of a compressed cylinder filmed from inside with only a few pounds of pressure probably about 8 psi if that much. https://www.youtube.com/watch?v=IyBRGhXBuGw
Imagine what it looks like inside your compressor tank and your water trap when your continuously compressing and releasing air pressure at 150 psi repeatedly over and over while using your machine?