I am having a hard time finding a pressure regulator and gauge with a moisture/particulate filter that can fit an older Badger compressor with a 1/4" (I assume NPT, because Badger is an American brand) male output (ps: in United States).
I also need a 1/4" male out from the regulator, as all my air hoses are 1/4" female and I do not want to buy new hoses. I also don't want to use converter/adapters to minimize leaks (i.e. this one is a 1/8" out: https://spraygunner.com/in-line-low-pressure-air-regulator-with-gauge-and-moisture-trap-filter-by-no-name-brand/.
Is 1/4" in and out not a common combination? Do I need to use adapters or change hoses?
Thanks in advance

Try here -

https://www.midwestairbrush.com/accesories.html

EJ

For regulator gauge (and filter if the fittings are the right size) I use Harbor Freight, along with their perpetual 20% off coupon. Oh, and I always grab the free gift - magnetic tray, brick of batteries...

Different fittings are available in this set:



If it doesn't have what you need, (as in my case when I built my pressure casting pot) Ace Hardware of similar places have all the fitting combinations you need.

They even give you the Teflon tape, which is critical.

Quick connect couplers are really useful!
I put them on all airbrush hoses.
Makes it so much easier to remove the airbrush from the compressor when I need to move stuff around
or simply for swapping between airbrushes.

The reason you see mine still in the package is because I have two other sets I took the couplers from. Lots of uses for my compressors - pressure casting, air tools, blast of cool air in 100 degree garage...

There a lot of tools I would NOT buy at Harbor Freight, but these fittings are a hell of a deal.

Paasche regulator+filter+trap R-75 has 1/4" fittings, I got mine off evilbay.

I ran an adapter for years on an older airbrush but it never leaked. Currently running a G-Mac quick connect between my airbrush and hose and it has never leaked.

I'm running one of these between my airbrush hose and hose from my big automotive compressor.

https://www.amazon.com/gp/product/B00171BFKK/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Thanks all, good to know the R-75 has the 1/4" connections already.
I only checked Home Depot/Lowe's, didn't think about Harbor Freight.