A friend is having a problem. It has stumped me.
He has his system hard plumbed. No leaks, and it's drive is a Blue Line 70 external pump.
Just for "poops" and giggles, it's a 120 in-wall display and a 30 breeder frag tank with a 20 long refugium and a 100 gallon stock tank used as a sump.
Everything is hard (pvc
pipes) plumbed and herd is the problem-
The system has been running fine for a month now, until today when he had a power outage. The sump filled and stopped, then the power was restored and the pump did not push water like it was supposed to. It basically sat idle but heated up so much that the outer casing was barely touchable.
Then after unplugging and plugging back in for a while, it fired back up.
He was so distraught, he went to "Champion lighting and supply" who just happens to be close enough, and bought another blue line 70.
He hooked it up and the exact same problem happened.
The guys at Champion said it was airlocked...that it back drained air into the pump and it could not self-prime. I find this ridiculous since the pump is below the sump and no way would it drain air below the water line inside the sump.
Can you give us any fresh ideas on why both of these pumps are not restarting?