We always hear when asked what kind of screen do you want....... a 6mm. But when tested,
several types of 6mm screens showed a vast difference in what each captured. And when it comes to screening, the purpose is to remove debris so your plant can function as it should. As we all know, throughout time, what the screen misses ends up in aeration tanks taking away valuable room for treatment. The debris clings onto valve stems and gates inhibiting their ability to function properly. Clings onto diffusers resulting in poor air transfer causing septic conditions. And damaging membranes. All of these cases result in unnecessary money spent and headaches.
Therefore, when choosing a screen, we need to look at what we really want out of it with capture and efficiency being most important.