I was contacted by DE as part of my maintenance plan. Overall the phone service was good. The young lady was courteous and arranged an appointment time convenient for me. The technician was very friendly and knowledgeable and answered all my questions. Upon inspection of the pressure value he immediately called in for service appointment and explained how that worked. DE technician for the pressure valve replacement arrived on time and completed the job. I was very satisfied with both technicians. Both were very professional, friendly and respectful of my home.