"If there be any among us who [disagree], let them stand undisturbed as monuments of the safety with which error of opinion may be tolerated, where reason is left free to combat it." Thomas Jefferson, March 4, 1801
PVC Overflow, dual flow paths, 2 inputs and 2 outputs. (Rated for 5000gph). Needs about 4" of clearance between wall and back of tank. Black in color. Made in the USA. Made for Aquariums and other situations where you need to move liquid from one tank or container down to another one below it without cutting a hole in the top tank. This is for a dual flow unit but these can be made with as many flow paths as needed. I.e. 3, 4, 5, 6, etc. Each flow path takes up about 6" of width so a 6 unit item would be about 36" wide and flow about 3600gph via gravity. These can be scaled up or down as needed. Flow rates exceeding 20,000gph are no problem with multiple flow paths. Please email us with your needs if this model does not suffice. :-) We can also make these for above ground swimming pools or any large vessel of water you need to cycle water out of without cutting a hole in it.
US Patents 7717474 & 9763429.
Clearance from the aquarium wall to the back wall should be about 4". Higher flow rates are possible with triple and quad configurations. Please email us.