Looking for a HOB Overflow Box

[gobytron]

IME, you dont want one of the CPR versions...
They are the most fallible of the two main designs for overflow box.

You want one that has a u-tube siphon...
They require manual siphon to start, but the last time I had to start mine was well over a year ago.

I have one available.
60$ shipped.

It serviceable but somewhat weatherworn from years of good use.


I will ship if you're interested.

Make sure you do some research on which design is best for you.
some are more quiet than others for example.