Anyone using a DIY pipe overflow?

[Reef Pilot]

Originally Posted by nanomano

To my knowledge it there is a power outage it will drain to a point and stop, like any overflow, and in terms of getting clogged, I think it could happen, but could be easily cleaned with a brush. if I wasnt going drilled this is the one I would use personally

That elbow at the end with the open end up (not shown in my pic) will kick in if the overflow slots get plugged. And yes, with a power outage it can only drain down to the level of your lowest slots. And it can't drain below that T at the back either.

Like I said, I tested it extensively, and could not think of a scenario where it could fail. Just make sure everything outside of the water is properly glued and airtight.

Of course the absolute best is a drilled tank, but if for some reason you can't drill it, or don't want to, this definitely works.