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.

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

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.

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.

• 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.

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

30 ft lbs

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.

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.)

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.)

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.)

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.

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).

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.

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.

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.

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

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

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

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

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

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

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

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

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).

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.

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.

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.

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.

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.