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treesprite · 04/04/2017, 04:53 AM

I guess if I put CL pipes through the OF, the OF would have to be wider, which defeats my purpose in using an external box with a slim low profile internal OF. Maybe in such a situation I should just put the sump drain stuff in the internal box then, and skip external. But then the internal OF would be sticking further into the tank, which I have been wanting to avoid.

I had a 75g with return pipes going through holes I had drilled in the OF, but through the wall of it. The OF stuck too far out doing it that way, but if the pipes are through the bottom, the overflow could be a little narrower (putting the pipes through the OF wall required having elbows in it, and those take more space than a straight vertical pipe).

04/04/2017, 04:53 AM	#14
treesprite Registered Member Join Date: Jul 2007 Location: Maryland Posts: 147	I guess if I put CL pipes through the OF, the OF would have to be wider, which defeats my purpose in using an external box with a slim low profile internal OF. Maybe in such a situation I should just put the sump drain stuff in the internal box then, and skip external. But then the internal OF would be sticking further into the tank, which I have been wanting to avoid. I had a 75g with return pipes going through holes I had drilled in the OF, but through the wall of it. The OF stuck too far out doing it that way, but if the pipes are through the bottom, the overflow could be a little narrower (putting the pipes through the OF wall required having elbows in it, and those take more space than a straight vertical pipe).