After reading the specs and other documentation about the Hiblow HP-40 I was definitely happy it was being used on my septic system instead of other manufacturer units. However I had questions and sent Hiblow an email and was completely blown away at how fast Mike responded and how much detail they provided!! I am a technical and detail oriented person and was so surprised at how much information they offer on their product. That obviously is a sign of their confidence in what they manufacture and sell.