Originally Posted by Danjo
Is it a bulkhead fitting where I need to reach into the tank?
Itís a poly tank on mine and I was thinking a self tapping collar bolt with a set screw would be a good solution
It's got a threaded portion and I'll bet you could tap and thread it right into your poly tank. In fact, on a poly tank, you might not even need to thread it...I'll bet you could thread it right into a properly sized hole you drill.
Drill a hole on top of the tank, near an edge where you can reach with a right-angle drill, cut your pick-up tube to length (a few inches shorter than the tank depth), slide the tube into the hole at an angle...and if need be, bend it into an arc then straighten it as you insert it, thread it into the hole you drilled (and, maybe, tapped?). That's it...no reaching into the tank.
If you use the other pick-up tube I normally use, and which I showed in a video, you don't even need to reach into the tank with that one. By drilling a larger hole, and elongating it a bit with a file or rasp, you can insert that one from the top. For a single heater, though, the tube I shared the photo of works just fine and the hole you need to drill is pretty small.