Drilling bulkheads

melypr1985 · May 27, 2017

Hey guys/gals! Need a little help. How much bigger does the hole need to be than the bulkhead? I'm thinking it's a 1/4 inch bigger, but I just can't remember. Thanks for the help!

Smo · May 27, 2017

That would be a bit sloppy. Go to the BRS website and look for the table in plumbing under glass drill bits.

reefwiser · May 27, 2017

http://www.usplastic.com/knowledgebase/article.aspx?contentkey=956
https://www.haywardflowcontrol.com/images/flowcontrol/PDF/BFPG-0511.pdf

Even Further · May 27, 2017

Make sure you know if its a schedule 40 or a schedule 80. And, follow the recommended hole size according to the brand or the part vendor.

Dom · May 27, 2017

melypr1985 said:
Hey guys/gals! Need a little help. How much bigger does the hole need to be than the bulkhead? I'm thinking it's a 1/4 inch bigger, but I just can't remember. Thanks for the help!

I'd say less than that. I always try to make the opening as tight as possible. Not so tight that you have to push/screw the bulkhead through, but not much bigger.

bubbaque · May 27, 2017

Are you asking if you have have a 3/4" bulkhead what size hole saw do you need? The sites reefwiser are accurate. I just drilled a 3/4" bulkhead and needed a 1.5" hole saw and it was a tight fit.