Let’s take an in-depth look at submersible primary sump pumps – the best ones of the 2 different types.

Submersible Sump Pumps PageSubmersible sump pumps with float switches are by far the most popular sump pumps. And for good reason. They’re quiet, reliable, long lasting and because they’re in water – water cooled so they won’t overheat.

There’s also what’s called submersible utility pumps. Utility pumps are portable and can be taken to the area of your house that needs water drained.

‘Auto’ Submersible Sump Pump

  • Come with a float switch so they turn on automatically.
  • Mounted at the bottom of your pit and some are capable of pumping spherical solids up to 50mm (2 inches) diameter.
  • Quiet.
  • Usually constructed of heavy-duty cast iron.

‘Manual’ Submersible Sump Pump

  • Not fixed to the bottom of the sump pit, which makes them portable units.
  • More portable, yes, but more annoying to have to manually turn on if required in the sump pit.
  • Usually lighter and constructed of specially engineered plastics.

 

Best All Round Submersible Sump Pump

 

It’s a Tie

In the best pumps for the money ranking the Zoeller M57 just edged out the Zoeller M98. However, here I’m calling them a tie because I want to spotlight both of them for you.

1) Zoeller M57 3/10 HP

Zoeller M57 Sump PumpShown right is the Zoeller M57. Capable of draining 43 GPM 5 foot above the sump. We’re looking at a high capacity submersible sump pump.

It can pass 1/2 inch spherical solids is fully cast iron and uses stainless steel hardware to stay rust free.

Because it’s a Zoeller you can expect it to last 15 years with proper care. Pick this one over the M98 below if you’re confident with its performance curve (Head vs. Flow).

Proportionally More Powerful and Expensive

1) Zoeller M98 1/2 HP

Zoeller M98 Sump PumpIn a tie for first as the best automatic submersible sump pump is the Zoeller M98. It is priced fairly and is capable of draining 72 GPM with 5 foot head (almost 70% more flow than M57).

The M98 is essentially the exact same unit as the M57. Only differences are the larger motor and corresponding larger casing diameter and higher flow rate.

Here’s its performance curve (height to discharge vs. flow rate). Be sure to double check that it matches your needs.

Best All Round Portable Utility Pump

 

#1 Best Seller

Superior Pump 91250 1/4 HP Submersible Utility Pump

Superior Pump Sump PumpThe best portable utility pump is amply named Superior Pump 91250. And neatly enough, it offers you the option to attach a tethered float switch to it. Not bad.

You can visually see the difference between the above permanent submersible sump pumps and the portable utility submersible pump to the right. Does it not look more portable?

It has a maximum flow rate of 30 GPM on level ground and includes a 10 foot cord for great portability.

Video of Different Brand Submersible Utility Pump in Action:

Sources:

1. Although information is missing, there is still useful info on the sump pump Wikipedia page that I consulted just for background info.

2. Superior Pump company webpage for the 91250 model was consulted. Performance curve and specs along with user manual and accessories are all there.

3. Lastly the Zoeller company webpage for the M98 and M57 models was researched.