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Drilling and glass work


jrcsh6

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Do we have anyone comfy with drilling glass and likewise building an overflow box? Just curious as a lot of us look around at used tanks here and there, and a lot of tanks aren't "RR".

Obviously there would be some understandings involved that the liability is off as far as a disaster. Just a thought I had while flipping through some swimming pool sized tanks without holes!

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I don't have a lot of experience with it but I've drilled a few holes glass holes and probably 20 acrylic holes and it's not bad at all.

 

With glass, confirm it's not tempered, put down a dam with plumber putty around where you want to drill, and fill with water. Once that's in place start drilling and letting the diamond hole bit do the work without applying pressure. Continually add new water as it will splash out and make sure you keep it cool as heat is your enemy. Few minutes later you'll be close to going through and just make sure you use slightest of pressure to keep it from chipping when it comes through the other side. If your nervous, just get a junk 10 gallon tank and do a few holes. Typically all bottoms are tempered, and most of the time the sides/back are not but always check!

 

As far as the bits and overflow kits, glass-holes is the best resource for this project and is a sponsor of INDMAS.

 

http://glass-holes.com/Complete-Overflow-Kits_c3.htm

 

If you are feeling lucky, they donated the following 700 GPH kit we'll be raffling off at the swap!

 

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Glass and holes are not hard at all. On thin glass, they are difficult. But thick glass makes it simple. Order glass for overflow from cooks glass. Super simple to have a "coast to coast" or inside overflow transferring to an outside box for plumbing.

 

Now, on my 150 rimless, I paid for them to drill the holes. Mainly, I didn't want to scrap a $1,000 tank. Lol. But I built my overflow box and outside box, drilled the 3 holes in the outside box myself. Pretty easy

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A spray bottle full of water works well also. I used a glass holes kit, and just taped the template on and had someone else mist the bit while I drilled. Doesn't take gallons of water, just enough to keep it cool. Drilled 4 holes in my 125, and one in my 75 gallon sump.

 

Biggest thing I found is to really ease back on the pressure when you're close to coming through, as that will help prevent it chipping around the edges. Also really helps to have a second person watching the other side as you go, to see when you're about to break through.

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  • 4 weeks later...

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