Rated 4.4 out of 5 by 8
Rated 5.0 out of 5.0 by Jimbo The box tells you which end goes where!
I recently ordered one of these to replace an old one I had that lasted for a very long time before it finally gave out. These water/oil filters will work whether you mount them close to your air compressor, or if you mount them at the end of the air hose, close to the tool you are using. The closer to the tool you mount these, the more water they will remove, due to the fact that more condensation builds up in your hose as the air goes through it, Anyway, for those people out there who don't know which direction these things get mounted, you have to refer to the box. If you threw out your box, I have attached a picture of the box mine came in, and here is what it says right on the sides of the box: Air Inlet: 1/4" NPT Male, and Air Outlet: 1/4 NPT Female. It also says that this filter is good for working air pressures up to 90 PSI. I hope this helps the people out there who are questioning how this things mounts! I mounted mine about 8 inches from the outlet of my air compressor to try to trap some of the water and oil that might come out right at the beginning of the air line. And I always use a disposable water filter on the end of the hose where my tools mount to keep the rest of the water out of my tools. Especially my paint guns!
February 8, 2015
Rated 4.0 out of 5.0 by toolguy no instructions for air flow direction
looks and fells like a good quality product, had to look it up at California Air's website for air flow direction, the blue metal end is the air flow out it's basically a inline hose filter
May 16, 2014
Rated 4.0 out of 5.0 by BobSeattle Good product - unfair criticisms
Several reviewers have criticized and given bad ratings because of lack of instructions about how to mount it. The box is labeled hose-end filter, meaning it will work in any orientation! I elected to mount mine to the compressor in a vertical axis, but could have put it at the end of the hose or even on the spray guy (which is the tool I want to protect from oil and water).
This is a slick little filter. I haven't put that many hours on it, but so far - so good. I recommend it for an economical, small, well built unit.
December 23, 2014
Rated 4.0 out of 5.0 by dooha it does the job
like everyone else said instructions would be great
December 18, 2014
Rated 4.0 out of 5.0 by littleparker how to install California Air Tools Water and Oil Filter, Model 317
Only problem - which way does the air flow and does it need to be mounted upright. No information to be found anywhere to these two questions.
January 9, 2014
Rated 5.0 out of 5.0 by zwieback Well-made, Sturdy and inexpensive
This is a well-made and sturdy little add on filter, to remove any small amounts of oil & moisture that might be in the air-flow... extra protection to protect a very sensitive and expensive tool. Well-worth it and well-made.
December 6, 2012
Rated 4.0 out of 5.0 by Crash Works good
Works good, but why are there no manufacturer's instructions included? I am sure that it would be helpful to folks new to air tools.
August 5, 2014
Rated 5.0 out of 5.0 by Gill sturdy and compact
I bought this oil filter to trap any oil that might seep past the piston of my air compressor used to winterize the water pipes in my house. It is stout and easily installed. I am new to air compressors and it would have been nice to have some documentation / instructions come with the filter (it came in a box with absolutely nothing else) to answer a few questions like: 1) which is the inflow end and which is the outflow? 2) does it need to be mounted vertically? and 3) can you get into the filter to clean it? My air compressor is brand new. I have only used it briefly once or twice. I have had on problems and nothing has collected in the filter yet.
March 26, 2013