Tempered or Not?

[rwynn]

I am trying to determine if the glass sides/back of my tank are tempered or not? Is there an easy way to determine? I read somewhere about a mandatory stamp, don't see one but it could be along the black trim?

I am thinking about drilling/cutting the holes for an overflow and return plumbing.

It is a 40g tall tank.


Thanks!

 

[Bifferwine]

Put on some polarized sunglasses and take a look. You know how the windows of your car look through a polarized lens (kind of a circular pattern)? The tank glass will look the same.

 

[Reefrookie]

This may help also;

Fish Aquarium and Tank* Sizes and Characteristics, starting an aquarium, buying equipment, choosing tanks

 

[rwynn]

Thanks yall, my tank wasn't on that list(40 TALL) but I don't think it is tempered. I have read in a couple places that there is a mandatory stamp on all tempered glass...my tank doesn't have a stamp.

 

[yote]

That stamp is a paper tag under the bottom glass.It could be tempered and tag ripped off,or it may not be tempered.
But most tanks now,the backs not tempered.

 

[Bifferwine]

I've never seen a 'mandatory stamp' on any of my tanks. I would not trust that method!

 

[rwynn]

Think I'll just build an overflow, I feel better about DIYing that since I've already got the tank all setup and I can work the 1.50 PVC easier than the tank.

 

[sen5241b]

Drill into the glass. If it shatters and a mass tidal wave of salt water floods into your home --then it was tempered.

(just kiddin --do not drill tempered glass)