AGA pre drill question

[1badbrd]

about to order new bulkheads, but the place ordering from is asking what size hole are drilled.

I asked for 1" bulkhead, but he is still asking what size hole ID is drilled.

So what the actual hole size for AGA 90gallon RR tank.

All i know is that there is a 1" and a 3/4" bulkhead, but ID of the hole?????

Please help the people at AG are not ansewing there phones

[acwilson]

1" bulkhead is 1 3/4" hole
3/4" bulkhead is a 1 7/16"- 1 1/2" hole
hope this helps

[trippyl]

i also had mine drilled 1 and 3/4 for a 1 inch bulkhead.

[morty]

Here is a chart from Aquatic Ecosystems:

http://www.aquaticeco.com//images/items/bkf1.jpg