In the past we have used zinc or aluminum housed filters with O ring seals. The problem is that wet air causes pitting at the O ring sealing surface of the machined metal.
This design seems to have the metal areas protected, so hopefully this filter will not have the same type of problem.
The auto drain seems to function better that most.
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Thank you very much for taking the time to review our PD10 coalescing filter. I am confident that the PD10 filter will continue to provide you with quality compressed air needed in your process. We are also happy to hear that the automatic drain valve is functioning to your satisfaction, as it is another great product in our quality air offerings. Please feel free to contact us with any questions, as we are here to assist.