Cooler air, more mileage, faster sewage
Once again strong claims are being made for strong magnets.
Specifically this company sells magnets you clamp on to things to make the fluid inside flow more efficiently. You could apply it to aircon plants, fuel systems and yes, sewage pipes.
Below shows such magnets clamped to a coolant pipe.
Published experiments on Magnetizer's site report this treatment measurably improves the efficiency of aircon cooling systems.
It's easy to be skeptical of this kind of claim. Very easy.
So before you go installing one of these devices, be sure to look at both sides of the story.