Aro-Flo Series Air Line Piggyback Filter/Regulator, 1/4 NPT Ports, 5 micron Element, 0-140 PSI PSI Spring Range, 47 SCFM Flow Rating

This model is safe up to 125 degrees Fahrenheit if it has the polycarbonate bowl. If you need higher temps, look for one with a metal bowl, which handles up to 175 degrees.

For a 1/4 NPT setup, 47 SCFM is a solid flow rating at that port size. The 1000 Series is classified as miniature, so it's built for lighter-duty pneumatic work rather than high-demand multi-tool lines. If you're running two tools simultaneously and they're both pulling decent air volume, you'd want to add up their combined SCFM draw and make sure it stays under that 47 SCFM ceiling. Single tools or low-draw equipment on a 1/4 inch line should have no trouble at all.

For cramped installs, a piggyback filter regulator is the combo unit that handles both air filtration and pressure regulation in one compact body. This model is that style, and it has 1/4 NPT ports with a 5 micron filter element.