Trapezoid Internal Overflow is 6"x 12", has a 1-1/2" Silent Drain Pipe Assembly and a 3/4" Return assembly with T discharge flare on the front of the overflow. Used for tanks up to 30" 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. 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 T 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.
See Internal Overflow in out Library Section for more information