Bulkhead hole size.

[hearttx]

I am about to drill my tank and I have a question on hole size. I have 1" bulkheads and the recommended hole saw size is 45mm. I have 40mm and a 50 mm saw but not a 45 mm. Has anyone drilled for a 1" bulkhead with a 50mm? Is 5mm going to make that much of a difference? Why not use the 50 mm? TIA!

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[Gorgok]

I'd rather have as small holes as possible behind my bulkheads. Less likely to mess something up...

Plus with amazon's cheap stuff and prime you can get something like this:
https://www.amazon.com/Hotusi-Diamo...736995&sr=1-26&keywords=diamond+hole+saw+45mm

About $10 and no worries.

 

[lapin]

Use the size recommended by the manufacture.

 

[mcgyvr]

Yep..Amazon.....buy one....do it...

 

[Dugthefish]

5mm is like 3/16". Cant really speak for plumbing through glass, but that seems like a reasonable yet slightly large oversize for a 2" hole.

 

[laverda]

With an oversized hole your putting more load on the outer thinner edge of the bulkhead making it more likely to fail. Get the proper size drill.