QUESTION: I recently purchased a used vacuum truck. One thing I noticed is it has three sight bubbles on the rear head. One of those glasses sits right dead center at the bottom of the head. Am I missing something, or does that sight glass have a purpose? Why would I ever want to...
Running on Empty?
With a sight glass installed at the lowest point on your tank, you can make sure all contents are evacuated, or remove the glass to flush out frustrating clogs
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