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The Zoeller M53 vs M57 Comparison

Both Zoeller M53 and M57 belong to the Mighty Mate 50 Series; however there are differences between them. Learn what these differences are and if they really matter. Learn how we compare them and what our conclusion is.
 
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The Five Differences Between M53 And M57 Sump Pumps

 
Base Material
The first difference is the material used for the base. M53 base is made of thermoplastic. The m57 base is made of cast iron. This difference is significant because an additional six pounds is added to the weight. Those six pounds keep the M57 more stable in the basin during heavy continuous pumping.
 
Impeller Material
The second difference between Zoeller M53 vs M57 is the material used for the impeller. The M53 impeller is made of engineered plastic with a metal insert. The M57 impeller is made of cast iron. A cast iron Impeller will last longer than an engineered plastic impeller. Even though the impeller is a vortex design and can handle small pebbles, small pebbles over time will eat the plastic impeller. Though one would think the cast iron impeller would rust over time, several plumbers have indicated the cast iron does not rust even after ten years. Water improves the resistance of the cast iron impeller against rust.
 
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Weight
The third difference is weight. The M57 weighs six pounds more or three kilograms. The cast iron base and shaft add the extra weight. Additional weight is always a positive factor because a sump pump moves in the basin during heavy pumping. Though the float is protected by a switch guard, limiting the movement of the pump in the pit is a good thing.
 
 
 
Cost
The fourth difference is cost. The M57 is approximately $20 more than M53. The extra $20 is worth the additional cast iron parts and weight. Those on a tight budget will still have a good reliable sump pump with the M53.
 
 
Volume Sold
The fifth difference is volume sold. Currently more M53 sump pumps have been sold. The sales volume is due to the fact that until the emergence of the internet, consumers did not know about the Mighty Mate Zoeller M57. For years plumbers have been installing the M53 because it is more reliable than its competition. Plumbers still install the M53 more than the M57 because of the price difference. However, with the sharp rise of internet usage, consumers are discovering that Zoeller manufactures more than the Mighty Mate M53. Since consumers place a high priority on buying a good sump pump, they are willing to spend an extra $20. Amazon is a great place to find both the M53 and the M57 at a great competitive price.
 

The Five Differences Are Worth Considering

We believe the five differences are worth considering when making a choice between buying the M53 or the M57. Having a cast iron base and impeller adds weight to the pump for more stability and avoids nicks and gouges to the impeller which come from small pebbles being whirled through the impeller at high speeds.
 
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Zoeller M53 vs M57 Comparison Also Reveals Five Similarities

Even those there are five differences between the M53 and m57, their six similarities are what makes the Zoeller Sump Pump a favorite among plumbers and consumers. Learn what these similarities are.
 
 
Cast-Iron Pump Housing
The first similarity between the Zoeller M53 and M57 is the cast iron pump housing. Cast iron is used for the housing on both sump pumps because it can withstand heat resulting from continuous pumping. It dissipates heat much better than thermoplastic, aluminum and stainless steel. Cast-iron will not warp, crack or break like thermoplastic does. In addition cast-iron is heavier than thermoplastic, aluminum, zinc and stainless steel. A heavy pump will remain more stationery in the basin.
 
 

The Float Switch

The second similarity is the float switch. Both the M53 and M57 have a two-pole mechanical float switch which means the float rod on which the float moves up and down as the water rises and lowers, is attached to the pump both at the top and the bottom. Many competitor brands do not attach the bottom of the float rod to the pump. The float itself is solid, buoyant polypropylene which makes it unsinkable should it get punctured. To prevent pit hang-up a stainless steel rust proof guard is used.
 
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The Motor
The third similarity is the motor. Both have an oil-filled, hermetically-sealed, automatic reset thermal overload protected motor. The motor is a third horse power with voltage options of 115V or 230V. The motor runs at a low 1550 RPM (revolutions per minute). The lower the RPM the less wear and tear on the motor. Zoeller makes their pump motors to run at 80% capacity which also lessens the wear and tear. The motor shaft is made of strong AISI 1215 cold roll steel rather than engineered plastic as used by some competitors. The motor cord is 3-wire UL listed with a three prong plug. Its maximum operating temperature is 130 degree Fahrenheit or 54 degrees centigrade. The auto reset thermal overload protection will shut the pump off it the temperature rises too high.
 
 

Warranty

The fourth similarity is warranty. The warranty has been increased to three years. A few years ago the warranty was only one year. Zoeller tests each pump before it leaves the factory. Most competitors only test a sampling. Since each pump has been tested that means it work after installation unless it was installed improperly. The main failure of any sump pump is the float switch. It cannot be emphasized enough the importance of replacing the float switch every three to five years depending upon the frequency of pumping.
 
 

Review Rating

The fifth similarity is popularity and best rated. Both the M53 and M57 are easily best sellers. Consumers like Zoeller because of its quality and performance. Both pumps rate 4.6 out of 5 which is excellent. It is no surprise both pumps rather highly because they are well built, run quiet and allow the consumer to keep the pump for many years because the replacement switch is easy to buy and install.
 
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Zoeller M53 vs M57 Comparison Conclusion

Zoeller M53 vs M57 reveals M57 has the advantage of a cast-iron base and impeller which adds weight and more stability to the pump during heavy pumping. For $20 additional cost, the Mighty Mate M57 is worth it. Like you, until ten years ago we did not know the M57 existed and could be purchased by consumers directly on the internet at websites such as Amazon.
 
 

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