Originally Posted by loadmaster
I first thought about tapping a new hole but the hole I have now, is small, only a small drop forms every couple of minutes. Did not want to make a bigger one. I went with the JB Weld and so far so good. Waiting to see what happens with the cold weather Thanks
The good news is that under normal service the tank isn't under pressure and there isn't enough depth to create much head pressure. A pinhole in poly tank material isn't likely to continue to fracture/travel so drilling stress stop holes probably wasn't necessary. A long(er) crack or a hard plastic tank would be a different situation.
I'll go with your choice on this. I've seen and had great success with JB Weld. Off the top of my head, JB Weld products have repaired a stripped out drain plug on an outboard motor gear case, an engine coolant system punctured aluminum casting (think pressure and heat), numerous other cracked aluminum parts, and many plastic parts. I've used JB Weld products to copy and remake actuator arms and similar parts.
FWIW. As long as the surfaces were properly prepped, your repair should be fine.