I have been horribly busy at work so I haven't been able to keep this thread up. I have had the time to make some small progress on my tank and I think this weekend I can catch up on recording the progress I have made.
bbehring: I appreciate your input. A lot of the things you mention are problems I am concerned about. I would like to put a slip fit just below the water line but the reason I am using unions is that the overflow is up to the level of the eurobracing. Being up to the level of the eurobracing makes it impossible for anything to fall into the overflow, but it also means I cannot use a slip fit because there is no room to slip anything on or off. The unions allow my to exactly slide the overflow under the eurobracing.
You are right, the unions are hard to undo, and that is a conern of mine. I think though, that I can always use a wrench and get them undone in a pinch. As far as the rest of the pipes being slip fit I don't think this will be a problem. All of the fittings are very tight and if there is a leak I think it will be only a trickle. I am considering placing a drain in the bottom of my steel pan so that if the tank did leak out and over fill the sump, it would drain out of my house instead of destroying the living room.
Everyone is very concerned about leaking, and rightly so, but if the power is out in your tank long enough for a trickle leak to drain the tank I think all the inhabbitants of the tank would have already perished from temperature changes and decreasing oxygen. If you reach that point the only issue left is protecting your home, which a drain in the steel pan would do. I of course intent to do my best to keep constant power and am installing a generator in my basement in case there is an emergency outage.
You also asked about my cut off switch. My wife did drive the canopy into the ceiling
![Frown :( :(](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f641.png)
but thankfully it was easily repaired. I have the switch, which my farther-in-law reports is a cut of switch, but honestly I am not sure how it works yet. I will post a picture this weekend.
tonyespinoza: I can't use a durso, but the Herbie stand pipe system fits nicely in the overflow, and if what I have read is accurate, it is much quiter than a durso anyhow.