Zoeller M53 Specifications - Well Built
If you are used to Big Box Store sump pumps, the M53 Mighty Mate will surprise you. It is heavy and very well built.
Zoeller M53 Features & Specifications Summary
Motor
3/10 HP; Voltage: 115 or 230 V; Phase: 1 Ph; Hertz: 60 Hz; RPM: 1550 RPM; Type: Shaded pole; Insulation: Class B; Amps: 4.8 - 9.7 Amps; Operation: Automatic; Cooling: Oil filled; Motor Protection: Auto reset thermal overload; Max Operating Temperature: 130 °F (54 °C).
Materials Used
Motor Housing: Cast iron; Pump Housing: Cast iron; Corrosion-resistant, powder coated epoxy finish; Cast iron switch case, motor and pump housing; Base: engineered thermoplastic; Upper Bearing: Sleeve bearing; Lower Bearing: Sleeve bearing; Mechanical Seals: Carbon and ceramic; Engineered, glass-filled, plastic impeller with metal insert; No sheet metal parts to rust or corrode; Stainless steel screws, switch arm, guard and handle; Motor Shaft: AISI 1215 cold roll steel; Gasket; Water tight and dust-tight; Permanently oiled bearings
Impeller Type
Impeller Type: Non-clogging vortex; No screens to clog; Solids Handling: 1/2" (12 mm) spherical solids; Discharge Size: 1-1/2" NPT.
Pumping
Float-operated, submersible, 2-pole mechanical switch; Solid, buoyant, polypropylene float; Pump Auto On / Off Points: 7-1/4" / 3" (18.4 cm / 7.6 cm); Max Head: 19.25' (5.9 m); Max Flow Rate At 0 Feet: 43 GPM (163 LPM); Max Flow Rate At 5 Feet (1.5 Meters): 43 GPM (163 LPM); Max Flow Rate At 10 Feet (3.0 Meters): 34 GPM (129 LPM); Max Flow Rate At 15 Feet (4.6 Meters): 19 GPM (72 LPM).
KEY FEATURES
PUMPING
HP: 1/3 Horse Power
Type: Submersible, Automatic
Float: Vertical 2-pole
GPM @ 5 Ft.: 43 GPM (163 LPM)
GPM @ 10 Ft.: 34 GPM (129 LPM)
GPM @ 15 Ft.: 19 GPM (72 LPM)
Voltage: 115 or 230 V
Phase: 1 Ph
Hertz: 60 Hz
RPM: 1550 RPM
Amps: 4.8 - 9.7 Amps
MATERIAL
Pump Housing: Cast iron
Finish: Corrosion-resistant, powder coated epoxy
Motor, Switch Case: Cast Iron
Base: Engineered thermoplastic
Float: Solid, buoyant, polypropylene
Impeller: Engineered, glass-filled, plastic with metal insert
Screws, Switch Arm, Guard and Handle: Stainless steel
Motor Shaft: AISI 1215 cold roll steel
MISC.
Impeller Type: Non-clogging vortex
Solids Handling: 1/2 in. (12 mm)
Discharge Size: 1-1/2 in. NPT
Pump Auto On: 7-1/4 in. (18.4 cm)
Pump Auto Off: 3 in. / 7.6 cm)
Max Head: 19.25 ft. (5.9 m)
Cord Length: 9 ft. (3 m)
Major Width: 10-3/32 in. (26.2 cm)
Major Height: 10-1/16 in. (25.6 cm)
Weight: 21 pounds
Zoeller M53 Reviews Reveal High Rating
Zoeller Sump Pump M53 Consumer Reviews rate this pump well; 4.3 stars out of 5. It is built with cast-iron housing and a vertical float switch. It is built to last; to keep it running for ten plus years, the float-switch will need to be replaced every 2-3 years depending upon how frequently it is used. See what consumers are saying about it.
Heavy Cast-Iron Sump-Pump
Jim Casey, Minnesota
August 21, 2016
I've had my Sump Pump M53 over 12 years. Before I figured out it needed a new switch, I bought another M53. I installed the new M53 and am keeping the old Zoeller with the new switch as a backup. We have a very high water table and the sump-pump runs every 2-3 minutes most of the year. You won't find a much better one out there that can run like this for 12+ years and only need a $20 switch. It is oil-filled for long life. It is quiet and reliable. I'll never run anything other than Zoeller.
Good Sump-Pump
Tom Jones, Iowa
May 23, 2016
I bought a Zoeller M53 23 years ago and it is still running. It only runs when we get heavy rains; however when it rains it is a work horse. It moves the water up an eight foot vertical lift and pushes it another 40 feet out to the street. In the past 23 years we have had some very heavy rains to the extent of area flooding, probably every 5 years. This pump has NEVER failed in ANY way yet. I am very happy with it.
Heavy Sump-Pump Built to Last
George Metcalf, Chicago, Illinois
March 12, 2016
I am very happy with my Sump Pump M53. It is very heavy and built to last. The housing is cast-iron. It was easy to install. I read the manual and found out I am to replace the float-switch every 2-3 years depending upon usage. The float-switch is the weakest part of the pump. So I bought a replacement float-switch so I have it ready in case the switch goes out before I change it.
Read More Key Reviews By 4 User Groups
Zoeller Sump Pump M53 Installation
Installing the Sump Pump M53 is easy, especially if you have done it before; however if this will be your first time, relax. You will not break anything. To alleviate pressure, choose a day when the sun is shining. .
Basically the steps are as follows:
- 1) Unplug the motor cord.
- 2) Loosen the bottom end of the check valve so the pump is free to move.
- 3) Carefully remove the old pump from the basin.
- 4) Unscrew the discharge pipe from the old pump discharge port and screw it into the new pump port.
- 5) Replace the old check-valve with a new one.
- 6) Place the new pump in the basin making sure it is sitting solidly on the basin bottome
- 7) Tighten the bottom check-valve end to the discharge pipe attached to the M53.
- 8) Plug the motor cord into the wall socket.
- 9) Test the pump and check for discharge or check-valve leaks.
- 10) No leaks, you are done! Congradulations!
If this is your first time for installing a sump-pump, you may want to read more detail and watch a video. Hopefully these Zoeller Sump Pump installation steps will help you so you can be more self-sufficient.
M53 Zoeller Sump Pump Parts
Keep your M53 if something fails. many parts are easy to buy online. It is more eco-friendly and more pocket friendly to replace a broken part than disguard a failed pump.
All replacement parts are made by Zoeller; therefore they will fit and work. The following parts are readily available online: gasket, switch, case cover, assembly arm, impeller and float.
The only thing we have replaced on our thirteen year old Zoeller M53 Mighty Mate is a gasket which was very easy to replace.
The Zoeller float switch will fail before the motor or housing; therefore Zoeller makes replacement switches available for the Mighty-Mate M53.
The replacement switch part number #004892 is made by Zoeller; therefore it fits perfectly any of the series 50 and 90s sump pumps. The switch is easy to replace. See the M53 17 Installation Steps with pictures.
The easiest and quickest way to replace the switch is to buy the entire case cap assembly which already has a new switch, gasket and arm encased. The part number is 004702. If the water level is down to the impeller and the four screws holding the pump head turn, it may be possible to loosen the screws and replace the switch cap without removing the pump from the pit.
Download the complete M53 Parts List here.
We have compared prices from various websites and have found Amazon to be the cheapest or same price as other online stores; therefore we provide the link for buying the M53 through Amazon.
Amazon is dependable and for those who are Prime Members, they offer very quick delivery.
If your current pump runs a lot during heavy rainstorms and then runs very little during no rain periods, we recommend you purchase the N53 which comes without a float switch. Installing an external separate float switch allows you to customize the ON OFF points for the motor which decreases motor short cycling and extends the life of the motor.
Our favorite external switch is the HC6000 which is electronic, has no moving parts, is not affected by water contaminates or chemicals and has a lifetime warranty. We installed ours in 2011, have done no maintenance to it and it is still working perfectly.
Each time a new pump is installed it is highly recommended the check valve be replaced as well because they do fail.
Our favorite is the Quiet Check valve because it is so quiet. The Traditional check valve is also available.
