Three sided Internal Overflow is 6"x 12", has a 1-1/2" Durso Standpipe Drain and two 3/4" Return assemblies on either side with swivle discharge flares. Used for tanks up to 24" tall. This overflow is incorporated into the middle of the end or back of your tank ( PLEASE TELL ME WHERE ). It is used in conjunction with a Wet-Dry Trickle filter. The overflow has a Durso Standpipe Drain. Additionally, this internal overflow includes a Return Assembly, this is used to mask the hose that brings the water from the Wet-Dry filter pump below back into the tank. It comes with a barbed fitting below the tank and a swivle discharge nossle that is 2 inches below the water level.
The overflow is black by default unless YOU specify otherwise. All bulkheads are included and all bulkhead holes are pre-drilled. Overflow also comes with a cover and a black-out panel.
See Internal Overflow in out Library Section for more information.