A: Cast aluminum housing with plastic container. ;)
A: This item has 1/4" Threading
A: No, it is just the filter, with 2 female NPT threaded openings.
A: No it does not. You have to buy the couplers
A: Yes, I run this at 175 psi
A: Yes I bought mine last week and working perfectly fine happy with my purchase.
A: Max. Pressure - 90 PSI
A: According to information I have seen for this type of in line air filter the max working pressure is 90 PSI. These filters are meant for use near a paint gun and installed after a secondary pressure regulator for that paint gun.
A: Yes, but it must be mounted as shown in the vertical position
A: Yes. It works good. I have it installed between the compressor and air line.
A: Yes, that's where you'll want to install it.
A: It is designed to work in line on the hose, probably near the tool it is designed to protect. But with the proper fittings I don't see why it wouldn't work in a permanent setup. I just wouldn't hook it directly to the output of the compressor. It's plastic and looks like it might not stand a lot of strain before it breaks.
A: Thank you for the interest in the 317 Water/Oil In-line Filter. For the best results you need to attach this filter to your air tool. As the air comes out of the compressor and goes through the air hose it cools. Air cooling causes moisture or water in the air compressor tank and air hose. This is why the you want the filter at the end of the hose next to your air tool.
A: This item was a waste of money for me. Just kinda fell apart after first oil change