AGA 75gal pre-drilled holes

[Tomo]

The pre-drilled holes in the built-in overflow in my new AGA 75 gallon measure 1 1/4" and 1 1/2". According to AGA's standpipe diagram and Durso's parts diagram my holes are too big for the standard standpipe! Is this the case? Has anyone else ran into this problem?

Thanks,
Tomo

 

[6Speed]

The holes in my AGA 75 are 1-3/4" and 1-1/2". I haven't bought the megaflow kit or the plumbing to set it up though.

 

[Tomo]

Oops, that's what I meant, mine are 1 1/2" and 1 3/4".

 

[dots]

I have the same tank, use the kit and you should be all right.

 

[Entropy]

For a Durso it doesn't matter what size the holes are. You build it based off the bulk head size. On my AGA 90 I had a 1.25 inch Durso draining through the 1 inch hole.