Drilling Overflows

glassholes.com. or I have a bit here for a 1 inch bulkhead, believe its a 1 3/4 inch bit. Ide be glad to let you use it. Im also using a 20 long sump on my 125, with a 14 gallon refugium that drains into the return chamber of the sump.

 

hey don Welcome to the club

You could check with Jason glaspie69 , he has drilled a lot of tanks

He lives in Independence


Also you should come to the waterloo area christmas party on dec 5

 

I have a 3" bit that you can use, but that's probably much larger than you need.

--AJ

 

here is where I order my hole saws from. I am getting ready to order some new ones.
http://www.thk.hk

 

2 1.5" overflows should work well on the 125 its what i have on mine and do just fine. i got my hole saw from ebay, but would suggest just getting the whole kit and kaboodle from glass holes. they give you the bulkheads, saw, overflow box, and vented elbows out the back for a pretty decent price.

 

Just for common knowledge you do realize you can NOT drill the bottom of that 125 as it WILL shatter into millions of beautiful little pieces of glass, stick with tapping the back side.

 

Good to know...and drilling tempered glass never turns out good.  Here's a pic of my sump that I was drilling.  I didn't know it at the time, but it was/is made out of tempered glass.  It's a great way to ruin your day....and your tank.

 

Two 1" drains is all I got on my 180.  But there isn't anything wrong with going bigger too.

 

Drilling isn't that bad, just as long as you are not trying to drill tempered glass. I have done about 20 holes. And the only ones that didn't drill right is tempered.

 

Troy is right, don't let the pic intimidate you. I don't have much experience with this, but I've been told that the thicker the glass, the easier they are to drill. Here's a link to our Wiki which has some guidance to determining if your glass is tempered or not. http://www.greateriowareefsociety.org/Resources/GIRSWiki/tabid/163/Default.aspx?topic=Tempered+Glass All along I suspected my glass as being tempered as it was a 75 gallon tank and only 1/4" thick. Non-tempered glass would have been 3/8" thick. I didn't know enough when I bought the tank to check for that. Another lesson that I learned at the University of Hard Knocks. With my luck, I feel like I'm in their graduate program. ;-)

Anyone out there have a 125 that they have drilled? How thick is the glass? I bet it's going the be 1/2" glass given the 6 foot span.

Also remember to drill the hole for the size of the bulkhead, not the size of the overflow that you need. If you want 1" overflows, you probably need to drill at least 1 1/2" if not larger (depending on the type and material of the bulkheads)

Good luck!

--AJ