Compared to the Wayne CDU980E, the M53 pumps far less water (a max flow rate of 2,580 GPH vs 4,600 GPH). However, unlike the CDU980E, the M53 is built with more solid construction Pumping Guides and stronger impellers, giving it the capacity to handle (crunch through) up to 1/2″ (12mm) spherical solids.
What this means is that, while slower, the M53 is far less likely to get stuck or clogged with debris or contaminants in your sump pit; this can make a huge difference in the lifespan of your sump pump, particularly if your groundwater or sump pit is dirty or full of impurities. Unsurprisingly, we’d expect the M53 to last between 7 and 15 years while we’d expect the CDU980E to last between 4 and 8 years; this is significant if you’re hoping to avoid replacing your sump pump for a good amount of time.
However, if you’re really looking for a long lifespan and to only deal with sump pump replacement once or twice over the course of your home ownership, you’ll want to look long and hard at the M267. Compared to the M267, the M53 is a beginner’s sump pump. The M267 pumps much, much faster (a max flow rate of a staggering 7,680 gallons her hour), is capable of handling up to 2″ solids, and is likely to provide up to a 20 year lifespan. There’s no comparison; if you want the best AC sump pump on the market, it’s neither the CDU980E nor the M53.