For sale – overflow with U tube, Hofer Gurgle Buster and plumbing. $35
Plumbing can be easily undone at union and attached to new plumbing.
Extra U tube available for $5
http://www.zld.ca/reef/oh1.jpg
http://www.zld.ca/reef/oh2.jpg
http://mywebpages.comcast.net/domitron2/HGB/HGB.html