[eadams]

this might sound like a dumb question but im needing to buy a bulk head and the hole is 1 3/4 inches if i measured it correctly...so what size bulk head size would i need 1 1/2 inch

 

[grennan]

Assuming schedule 40 bulkhead. 2 3/8" hole would be required for 1 1/2" bulkhead. For an 1 3/4" hole you would need a 1" bulkhead.