Re-Drilling an existing hole

[slicktoppomp]

So wondering if any of you have successfully done or have experience in drilling over an existing hole to make it bigger. My project tank is a 30 gallon glass cube. Currently has a 1” bulkhead installed. Wanted to see if it is possible to drill over that existing hole to fit a 1.5” bulkhead. I want to run an Eshopps Eclipse overflow and they require a hole for an 1.5” bulkhead. If not I’m gonna have to try and build my own with the existing hole and limit my herbie drain to 3/4” which is sufficient but I’d like to just plug and play if I could.


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[oceanslide]

I don't see why you couldn't, just make sure you have the right bit and go slow.

[slicktoppomp]

I don't see why you couldn't, just make sure you have the right bit and go slow.

I would think it wouldn’t be any different right? Hopefully somebody on here has done it. I didn’t drill my tank myself though LarryM drilled it years and years ago for me. I’d have to have someone who knows what they are doing drill it.


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[OhioStreetz]

I’ve done this and it does work just take it very slow and lots of water

[BajaReefs]

Get a piece of plywood and cut the bigger size template and clamp it down to the glass to prevent the hole saw from moving all over.

[slicktoppomp]

Cool well it sounds like it can be done. Anyone in north county available to do the drilling? I live in Fallbrook so anywhere fairly close. I’m good with building stuff and tinkering with things but I don’t wanna drill. Last test tank I practiced drilling on didn’t fair too well.


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[LotsaFishies]

I can drill it. Located in Escondido. $75 if I have to come to you, $25 if you bring it to me.

[slicktoppomp]

I can drill it. Located in Escondido. $75 if I have to come to you, $25 if you bring it to me.

That sounds pretty good to me. Hopefully I will be ready to drill by the middle to end of March. Waiting on getting my living room situated before I build my new stand and have the permanent spot picked out. Can’t wait to get back into the hobby. Been a long long time.


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