The bigger magnet wasn't introduced on the mb3 due to trust issues.
There is no product, except one, that can claim to be a single pass item. It may be possible, but the added resistance or pressure drop needs to be taken into account. Spirotech uses a dual and different method of dirt removal-dirt separation.
Spirotech was mainly a commercial based company, and in the commercial sector pressure drop matters. So the design of the domestic filters does and will always take pressure drop into account. Pressure drop can always be converted back to energy being used, even on a fixed head pump.The trick is to develop a product that uses very little energy, but still removes dirt effectively- we consider this as efficiency.
Spirotech introduced the larger external magnet because they can now increase the pass rate removal of magnetic particles, use an extremely strong magnet that is easily accessible, they have increased the removal of non magnetic particles, uses less than 2watts per hour due to a low pressure drop,still maintain the slip socket easy fitting feature, still keep the 20 year guarantee, and have increased the wet weight capacity to 700 g, and is brass which makes it robust. It is the most efficient product on the market.
Putting things in perspective, having a large magnet is great, but if that same product has a pressure drop of ,let's say, 8.1Kp or 81 mb, that equates to 4.1 watts per hour, and that empty. Remember the flow path in the Mb3 is at the top through the technology which is the least path of resistance, if it were around the technology, then the more the chamber catches the tighter the flow path becomes, increasing the resistance. The PD remains the same through out on the spirotech products.
But of course opinions vary
But your point is fair, just slightly mis guided.[/b]
