I have used HiBlow septic aerators for more than thirteen years. They have never failed , running 24/7 for all that time. I just got a new one, as the current one is now 3 years old and needed new diaphragms for best performance. I’ve also had a couple of contacts with HB online help and never had a problem with the responses. Thank you for making such a great product line. I do recommend the units with alarms attached as that is a great safety feature.