Resources

Tools & Calculators

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Friction Loss

Total Head Lost:
Total PSI Lost:
Velocity (ft/s):

Values are for estimating purposes only and may not meet Hyrdaulic Institute standards

PSI/Head Converter

Head to PSI Converter
PSI:
PSI to Head Converter
Head in Feet:

Wire Size Calculator

Wire Size:

Values are for estimating purposes only and may not meet NEC code

Pump Data Worksheet

Pumping Requirements

Enter Gallons Per Minute required by application.

Elevation

A. Suction Lift
Enter vertical distance, in feet, between the water level and pump inlet.

B. Elevation Change
Enter the vertical difference, in feet, between the pump inlet and the highest point in the system.

Friction Loss

Enter total system friction loss. For assistance, refer to Friction Loss Calculator.

Head in Feet (converted from PSI)

Enter the head in feet, converted from psi, required by the largest zone of the system. For assistance, refer to PSI/Head Converter.

Total Dynamic Head (TDH)

Press "Calculate" to determine the Total Dynamic Head of this application.

Power Source
Water Source
Submit your pump data worksheet
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Send completed worksheet to:


Technical Documents

Assembly & Installation Instructions

Universal PRO Pump Enclosure Assembly Instructions

Download PDF

Complete PRO II Assembly Instructions

Download PDF

Flexible Grooved Coupling Installation Instructions

Download PDF

HDPE Coupling Installation Instructions

Download PDF

HDPE to Grooved Transition Coupling Installation Instructions

Download PDF

Cam Valve Installation

Download PDF

Specifications & Drawings

Munro Complete PRO II 3/4-3hp Centrifugal Pump with SmartBox

Download zip file

Munro Complete PRO II 5hp Centrifugal Pump with SmartBox

Download zip file

Munro LP Series 3/4-5hp Centrifugal Pumps

Download zip file

Munro Self-Priming High and Medium Head Pumps 71/2-20hp Centrifugal Pumps

Download zip file

Munro FS Series 1/3-30hp Submersible Pumps

Download zip file

Munro FSE 3/4hp Effluent Pump

Download zip file

Munro FSA 1/3-3/4 Sewage Pump

Download zip file

Munro FSA 1-2hp Industrial Survivor Sewage Pump

Download zip file

Munro RP Series 1/2-5hp Submersible Pumps

Download zip file

Munro RP Series 2-5 hp Amphibious Submersible Pumps

Download zip file

Munro RP Series 7.5-20hp Large Volume Submersible Pumps

Download zip file

Munro MXS Series 3/4-2hp 5" Bottom Suction Submersible Pumps

Download zip file

Munro StartBox

Download zip file

Munro SmartBox

Download zip file

Munro SmartBox - Reduced Incoming Amperage

Download zip file

Munro SmartBox - Reduced External Voltage

Download zip file

Munro BrainBox

Download zip file

Munro DamBox

Download zip file

Munro TimeBox

Download zip file

Munro Pressure Start Box

Download zip file

Owners Manuals

LP Series Centrifugal Pumps (Includes 1502 and 3005)

Download PDF

RP Series Submersible Pump

Download PDF

FS Series Submersible Pump

Download PDF

SmartBox Series Pump Control and Protection Boxes

Download PDF

Start Box Series Pump Start Relay

Download PDF

Freeze Defeat Safety Data Sheet

Download

Tips & Troubleshooting

Centrifugal Pump and Controls Troubleshooting Guide

Download PDF

Centrifugal Pump and Controls Troubleshooting Guide - Spanish

Download PDF

Centrifugal Pump Typical Applications Schematic

Download PDF

Mini Pump Guide Booklet

Download PDF

Pump Winterization Tips

Download

Friction Loss Chart

Download PDF

Wire Size Chart

Download PDF

Chemical Resistance Chart

Download PDF

Pump Station Winterization Checklist

Download PDF

Pump Station Maintenance Checklist

Download PDF

Catalog

Get a For Irrigation Pump Resource Catalog!

Download our For Irrigation Catalog or complete the form below to order a printed catalog.

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FAQs

General

Where can I find a Munro distributor?

To find a Munro distributor, please visit our find a distributor page and complete the form. Our team will contact you shortly after the form is submitted.


 

What kind of warranty does Munro offer?

Our warranty statements and timeframes vary for different types of products. Please click the links below to view the appropriate warranty statement.
 • Pumps, pump controls, valves, fittings and accessories manufactured by Munro (Contact)
     Warranty statement
     Warranty procedures
     Packaging guidelines
Pump stations (Contact)
     Warranty statement for pump stations
     Warranty statement for pump stations integrated with Baseline


 

How can I become a Munro distributor?

To learn more about becoming a Munro distributor, please visit our Wholesalers and Distributors page and complete the form. Our team will contact you shortly after the form is submitted.


 

How can I place an order with Munro?

To place an order, simply email a purchase order to orders@munropump.com or contact us and we will assist you.  Our regular hours are 8:00AM to 5:00PM MT, Monday through Friday. We do not currently offer online ordering.


 

Shipping

If I order from Munro, how long will it take to receive my products?
  • For stock orders, we are usually able to ship in 3 or fewer days.
  • For non-stock and custom orders, your Munro representative will be able to give you a good estimate of the time it will take to produce your order.
  • Our freight map gives a reliable estimate of time to receive your products, after ship date.

 

Does Munro have shipping requirements for warranty returns?

Yes, our shipping and packaging guidelines provide clear instruction to return goods to Munro. (more)

Centrifugal Pumps

**NOTICE** Please follow all safety precautions, as indicated in the owner's manual, any time you are troubleshooting or interacting with a Munro product.

 

What is the torque spec for the housing bolts on Munro LP pumps?

30 ft lbs


 

How do I check voltage entering a pump?

While the motor is running, use a voltmeter to determine if line voltage to the motor is the same as indicated leaving the breaker box.


 

What is a good way to find air leaks in pipes and fittings?

Air leaks can be tough to locate. One method that we have used is to wrap plastic wrap tightly around a potential air leak path (union joint or cam fitting), turn pump on. If an air leak exists, the plastic wrap will tighten to the area. (See our Troubleshooting Guide for Centrifugal Pumps and Controls for more info on troubleshooting your pump.)


 

How do I clear a centrifugal switch?

Debris can get caught in the centrifugal switch inside the motor, causing the motor to hum. A soft hammer or 2x4 board can be used to firmly tap the butt of the motor to attempt to clear the centrifugal switch. After three or four taps, try to engage the motor. If necessary, repeat. If this does not help, debris in the centrifugal switch  may not be the issue (See the glossary for more info on a centrifugal switch. See our Troubleshooting Guide for Centrifugal Pumps and Controls for more info on troubleshooting your pump.)


 

How do I access the wrench slot on a centrifugal pump?

Check the motor shaft for a slot to fit an open-ended wrench. This can aid in diagnosis and tear-down/assembly procedure. (See our Troubleshooting Guide for Centrifugal Pumps and Controls for more info on troubleshooting your pump.)


 

How do I replace a seal in a Munro LP Pump?

SEAL REMOVAL
1. Remove the case bolts and pump body from motor assembly.
2. Remove diffuser bolts and diffuser from motor assembly.
3. Insert an open-end 9/16” (LP075B, LP100B, LP150B, LP200B, LP300B) or a 5/8” (LP1502B) wrench into the side of the mounting ring, slowly turning the impeller until the wrench seats itself onto the flats of the shaft. Once properly seated, the wrench will keep the shaft from turning. LP3005B model uses keyed shaft and sleeve. Removal of these impellers may require high heat to remove the shaft sleeves.
4. Expose the seal assembly by spinning the impeller counter-clockwise to unthread it from the motor shaft.
5. The seal spring will release as the impeller is removed.
6. Being careful not to damage the motor shaft, remove the seal head, seat and rubber from the seal pocket. The use of a screwdriver or similar tool may be necessary.
7. Should the seal be difficult to remove, the mounting ring can be completely removed for easier access by taking out the mount ring bolts.
8. Once the seal is removed, clean the pocket removing all debris. The rotary seal assembly must be handled carefully to avoid damaging the precision lapped faces of the sealing components.

SEAL INSTALLATION
NOTICE: It is recommended to only install new seals. Do not install used or dirty seals.
NOTICE: Application of a light coat of multi-purpose chassis grease to the outer diameter of the rubber gasket may make installation easier. Be certain the seat is kept clean and free of dirt and/or grease at all times.
1. Insert the seal seat rubber gasket into the recessed area of the mount ring.
2. Slip the seal head assembly onto the motor shaft.
3. Using uniform pressure, be sure the seal’s seat or mounting ring has completely bottomed-out in recessed area.
4. After placing the spring, install the impeller and bolt the diffuser onto the motor assembly.
5. Replace and bolt the pump body to the motor assembly.


 

Why would I need a gauge on my centrifugal pump?

A pressure gauge on the pump is a good indicator of system performance. Low pressure while the pump is running indicates a suction or obstruction problem (before the pump). Normal pressure readings at the pump commonly indicate a sprinkler head or pipework problem (after the pump).


 

How do I check the motor rotation on an LP Pump?

All Munro LP pumps run in a Counter-Clockwise (CCW) rotation only. (When facing the pump’s suction tapping, all Munro pump motors are pre-wired to run in a Counter-Clockwise (CCW) rotation only. Rotation from the motor end perspective is Clockwise (CW) and is marked as such on the motor nameplate). Tampering with or reversing the rotation will damage your pump and void the warranty.

To check the rotation:
1. A fractional second application of power can be applied to a 3-phase motor to verify CCW rotation of shaft (sometimes referred to as “bumping the motor”).
2. Improper rotation can cause catastrophic pump failure and voids the warranty.
3. Reversing two of the three power wires makes the motor run in the opposite direction.


 

What other equipment should I include in a pump installation / set up?

1. Strainer – Use of strainers prevent large debris from entering pump system through suction line.
2. Pressure Gauge – Use of a pressure gauge helps to
troubleshoot and identify a pump or system issue.
3. Discharge Valve – Use of a gate or ball valve on the discharge side of a pump allows pump isolation for removal.
4. Foot Valve – Use of a foot valve (or check valve) can aide the priming of a centrifugal pump. If suction lines are kept full, the pump does not have to evacuate the air before pumping  water.


 

How do I winterize my LP centrifugal pump?

1. Drain the entire system if there is a danger of freezing.
2. Drain ports are provided in both upper and lower pump case chambers.
3.  Closing the drain ports and filling the pump case with non-toxic Munro Freeze Defeat will reduce the oxidation in the case over the winter. Before spring start-up, drain the Munro Freeze Defeat from the case.


 

Why is my motor not running?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls:


 

Why does my centrifugal pump motor hum?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls:


 

What happens when motor cycles and/or nothing happens?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls


 

Why does my pump run but is pumping no water?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls:


 

Why does the flow cycle of my pump surge?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls


 

Why is my centrifugal pump's performance reduced?

Take a look at this diagram from our Troubleshooting Guide for Centrifugal Pumps and Controls


 

Submersible Pumps

**NOTICE** Please follow all safety precautions, as indicated in the owner's manual, any time you are troubleshooting or interacting with a Munro product.

 

What steps are needed to ensure a Munro submersible pump is properly winterized?
1. Remove pump from water source and allow to drain in vertical position.
  • If the pump is positioned vertically, with the water intake at the bottom and the pump will self-drain.
  • If the pump is laying on its side or in a position other than fully vertical, position the pump vertically to ensure water is drained from all internal cavities.
2. Ensure water level is below the intake of the pump.
 

 

What if my submersible pump does not start?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
1. No power is supplied. (Power outage)
2. Open circuit or poor connection of the cable.
3. Impeller is obstructed.
1. Contact power company or an electrical repair shop.
2. Check if there is an open circuit in the cable or wiring.
3. Use OHM meter to check the status of circuit.
4. Inspect the pump and remove the obstruction.

 

 

 

 

 

 


 

What if my submersible pump starts but stops immediately, causing the motor protector to actuate?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
1. Impeller is obstructed.
2. Voltage drop.
3. A 50 Hz model is operated at 60 Hz.
4. The strainer is obstructed, and the pump was operated dry for a long period.
5. Motor sounds abnormal or will not run.
6. The pump is picking up too much sediment.
1. Inspect the pump and remove the obstruction.
2. Correct the voltage to the rated voltage, or use an extension cable that meets the standard.
3. Check the nameplate and replace the pump or impeller.
4. Remove the obstruction.
5. Repair the motor or replace with a new motor.
6. Place a concrete block under the pump to prevent pump from picking up sediment.

 


 

What if the submersible pump’s head and pumping volume is lower than expected?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
1. The impeller is worn.
2. The hose appears to be clogged.
3. The strainer is obstructed or buried.
4. The motor rotates in reverse.
1. Replace impeller.
2. Minimize the number of bends in the hose. (in an area with a large amount of debris, use the pump in a meshed basket.)
3. Remove the obstruction. Place a concrete block under the pump to prevent pump from picking up sediment.
4. Interchange the power supply terminal connection.

 


 

What if my submersible pump is drawing high amps?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
1. No system back pressure.
2. Incorrect wiring.
1. Install a valve to regulate discharge flow.
2. Verify ground and power wires.

 


 

What if my submersible pump is running but it is not moving water?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
Pump running backwards. Exchange any two of the power wires.

 


 

What if my submersible pump is generating noise or vibration?
POSSIBLE CAUSE(S) CORRECTIVE ACTION
1. The bearing of the motor may be damaged. 1. Replace the bearing. Contact an authorized service center or the dealer where you purchased the equipment.

 


 

Pump Controls

**NOTICE** Please follow all safety precautions, as indicated in the owner's manual, any time you are troubleshooting or interacting with a Munro product.

 

Why isn't my StartBox working?

Take a look at this diagram from our Munro Troubleshooting Guide: 


 

How can I tell if my SmartBox is working correctly?

Take a look at this diagram from our Munro Troubleshooting Guide: 


 

Why is the contactor buzzing in my SmartBox or StartBox and what can I do about it?
You may not have enough voltage going to either the contactor or coil. Use a volt meter to check voltage.
 
On the contactor, the voltage should match the incoming voltage from the breaker. Be sure to put your leads on the L1 and L2 - not ground to L1 or L2. This will show the true voltage going to the contactor. If the voltage at the contactor is lower than the voltage at the breaker, you may have a break in your electrical line.
 
Another possibility is that the irrigation controller does not produce enough voltage to energize the coil. To measure incoming voltage, connect the volt meter to the white and black leads. If incoming voltage is less than 18 volts, the incoming voltage from the irrigation controller may not be strong enough and will make the contactor buzz.
 
A third possibility is that there may be debris in the contacts. Turning your pump on and off, rapidly, at the irrigation controller could dislodge debris that may be interrupting the signal.
 

 

 
My irrigation controller does not deliver enough power to energize the MPLC24 Smart box.

In the MPLC24, the contactor needs more than .35 amps to active the coil. If the irrigation controller delivers less than .35 amps, a Munro SmartBox - Reduced Incoming Amperage (MPLC242W22 (230v pump) or MPLC242W11 (110V pump)) is required. The Munro SmartBox - Reduced Incoming Amperage box accepts a low amperage start/stop signal, to provide all of the benefits of the standard SmartBox, including loss of prime and run-dry protection, even when signal amperage is reduced. This is commonly seen in 2-wire systems and with super economical irrigation controllers (big box stores).


 

Strainers

How do I know which size strainer I need?

What is the diameter of your pump's intake pipe? You can match the strainer you choose to your pumps intake. For smaller pump intakes, a bushing can be used to adjust the size. Our strainers will typically work well with pumps from 1hp to 10hp, and flows up to 160 gallons per minute.


 

How do I know if I need a self-cleaning strainer rather than an ordinary basket strainer?

If you are pumping from a water source that is relatively clean, then a basket strainer should meet your needs. If your water supply carries a large amount of algae, moss, or other debris, or if you have a history of clogged intake screens, then a self-cleaning strainer may be a better choice.


 

What difference does it make if the pump's intake screen gets a little clogged?

A clogged intake screen will reduce the efficiency of the system, causing the pump to work harder to produce less water. This will result in increased costs of pumping, shortened pump life, and uneven water distribution. Uneven water distribution may result in dry, brown patches in turf, loss of plants, and crop failure in agricultural applications. Intake screens should be cleaned and, if you find that your water supply carries a large amount of algae, moss, or other debris, or if you have a history of clogged intake screens, then a self-cleaning strainer may be a solution.


 

My water is piped directly into my pump. Will a basket strainer work for me?

No. Basket-style strainers will only work when pumping from an open water source, such as a pond, ditch, canal, or irrigation sump. There are many kinds of in-line filters that will work for your situation. We suggest a fairly coarse screen as a pre-filter for the pump, and a second screen after the pump that is fine enough to prevent your sprinklers from becoming clogged.


 

My neighbors and I share a pumping system and a pond, and we have problems with algae and weeds clogging up the pump intake. Would a self-cleaning strainer help?

Yes, most certainly! Our self-cleaning strainers will help to prevent algae and weeds from being drawn on to the screen and keep your pump system operating efficiently. It is also a good idea to treat your pond to minimize the algae problem.


 

Pump Data Worksheets

Centrifugal Pump Data Worksheet

Editable PDF

Custom Pump Control Worksheet

Editable PDF

Pump Station RFQ Worksheet

Editable PDF

Simplicity Request Worksheet

Editable PDF

Waterfeature Pump Data Worksheet

Editable PDF

Well Pump Data Worksheet

Editable PDF

Dewatering Pump Data Worksheet

Editable PDF

Marketing Materials

Flyers/Brochures

Custom Controls Flyer

Download

StartBox Upgrade Flyer

Download

Specifiable Irrigation Products Brochure

Download

Dewatering Line Brochure

Download

Data Sheets / Cut Sheets

LP Series Centrifugal Pumps Cut Sheet

Download

Sump Pump 1/7 Hp Series Cut Sheet

Download

Complete PRO II Pump Package Cut Sheet

Download

Complete PRO II 5 Hp Series Cut Sheet

Download

TimeBox Push-Button Control Cut Sheet

Download

StandAlone Pump Station Cut Sheet

Download

Simplicity 70VFD Pump Station Cut Sheet

Download

Baseline Integration Cut Sheet

Download

Irrigation Foot Valve Cut Sheet

Download

Basket Strainer Cut Sheet

Download

Posters

Centrifugal Poster

Download

Submersible Poster

Download

Counter Signs

Counter Sign - Complete PRO II

Download

Counter Sign - Universal Enclosure

Download

Counter Sign - LP Series

Download

Counter Sign - Pond Series

Download

Counter Sign - StartBox

Download

Counter Sign - Strainer and Irrigation Foot Valve

Download

Counter Sign - SmartBox

Download