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Intake Drill Sizes

post #1 of 3
Thread Starter 

I know that a 3/4 threaded piped threads snugly in a 1 inch hole.

If I wanted to use a 1 inch pipe and ball valve or even one thats 1 1/4 ,

what size hole makes for a nice tight thread installation ?

Thanks in Advance Dave

post #2 of 3
My best advice is to look up the size pipe you want to use say on Home Depots website in the specs for the pipe it will tell you the overall diameter of the pipe. For instance a 3/4inch pipe is about 1.05 inches in diameter. That's why I believe it's so widely used as the go to size easy to make an even 1 inch hole to match the threading
post #3 of 3
I would look at step drills. I know Harbor Freight sells them.
That's what I built my UDS's with.
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