External Herbie Overflow Bulkheads

[BenM002]

Hello,

I'm trying to make my own external herbie overflow based on products already out there. Like this:

For the drain and emergency I want to use 1 inch bulkheads. I would assume it would be the same size for the aquarium-overflow bulkhead but based on the images I've seen they look bigger. Is that the case?

Thanks,
Ben

 

[vetteguy53081]

Hello,

I'm trying to make my own external herbie overflow based on products already out there. Like this:

For the drain and emergency I want to use 1 inch bulkheads. I would assume it would be the same size for the aquarium-overflow bulkhead but based on the images I've seen they look bigger. Is that the case?

Thanks,
Ben

Most are larger but you want to base it on the size of the hole