Thank you for contacting Gas Fix and having Scott service your Pentair pool heater. Though we do carry over 300+ of the most common parts on the service vehicle and have the parts on the vehicle 97% of the time, there are rare circumstances when something is not on the service vehicle. By stocking a large variety of parts in the warehouse, we can provide a quick turn-around to get your heater working again as we did in this case. Should you ever require us again in the future, please do not hesitate to contact us. Again, thank you for your review. ~ Jason, Office Administrator