help to newbie about overflow

[Bob]

I use an overflow....never had or have had any problems...no flooding...they are self priming if the power goes off......I have used them for more than 15 years....different ones..imo....it is easy to upgrade your tank...or downgrade and you never have to have a drilled tank....right now I have one on a 72 bowfront.....just buy a larger pumo than what the rating is...that stops bubbles getting caught in the syphon tube.....even if bubbles build up..the flow does not stop...just slows up a bit...
The last one I bought was from blue world when Mike still had the store...but I am very positive Ken could get you one