plumbing for Lincoln model #9101 unloader valve on two stage compressor.

by Larry Williams
(Lakeport,California)

I have a Lincoln model #9101 two stage compressor that has what I think is an unloader valve on the side of the compressor. There are three fitting that appear to take 1/4 inch copper tubing. One line goes from the valve to the head on the compressor.But I am not sure where to connect the two other lines.I have a pressure switch on the storage tank but it does not have a fitting for plumbing.I also am not sure if I need back flow valve's on the inlet pipe to the tank and one on the outlet side.Can you help me? Thank you.

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Bill says...

Your request is posted Larry. Good luck! I hope you can find a Lincoln air compressor adviser via this site. I sure am not one.

As to the back flow valve, typical compressor configuration has the tank check valve located where the air from the pump enters the tank. So, you may already have one there.

Cheers,

Bill