MTH Pumps - Support Page
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MTH Pumps - Product Support

There are many forms of support available to current users of our products. For installation, operation, maintenance, basic troubleshooting, and maintenance questions please download one of our Pump Manuals listed below. If one of these manuals does not answer your question, please contact your Representative or Distributor (who often has knowledge of both your application and the pump) and they will assist you or get the proper assistance for you.

Repair kits are available for quick shipment for onsite maintenance by a mechanically inclined customer (see pump manual), or by arrangement with your local distributor office in many cases. For more complete failure analysis, major rebuilds, or when trained repair personnel are unavailable, please consider a factory Product Return for Repair.

General Sizing Procedure: «Click here to learn how to read a our pump curves.

Pump Model Identification: «Click here to learn how identify your pump.

Relief Valve Sizing: «Click here to learn how to correctly size a relief valve for your pump.

Motor Information: «Click here to see motor specs & dimensions.

Product Return/Repair Information: «Click here for product return and repair information.

Warranty Information: «Click here to see our standard product warranty information.

P31, T31, E•T Series, 100•200 Series, M•L Series, C Series, D Series, X Series, Motor Information and Support, Manuales Traducidos Españoles,

Product Return Repair Information, ISO Certification,Quality Policy, Mission Statement, Limited Warranty, Standard Terms and Conditions of Sale (WI-7.2.3-07)

Information Last Updated 2/14/19

P31 Series Support

T31 Pump Manual Standard Parts Listings

P31 Series Pumps
872 KB

Not available at this time.

T31 Series Support

T31 Pump Manual Standard Parts Listings

T31 Series Pumps
1.06 MB

Manufacturing Part Number Listings

E41 • T41 Series Support

T41 Pump Manual Standard Parts Listings

T41 Series Pumps
1.24 MB

Manufacturing Part Number Listings

E51 • T51 Series Support

T51 Pump Manual Standard Parts Listings

T51 Series Pumps
2.45 MB

Manufacturing Part Number Listings

140 • 180 • 240 • 280 Series Support

150 • 160 • 170 • 250 • 260 • 270 Series Support

150•;160•;170 250•;260•;270 Pump Manual Standard Parts Listings

150•160•170 Series Pumps
598 KB

250•260•270 Series Pumps
933 KB

Not available at this time.

M50 • L50 Series Support

M50 & L50 Pump Manual Standard Parts Listings

M50 & L50 Series Pumps
1.54 MB

Not available at this time.

C41 • C51 • C61 Series Support

C41 Pump Manual Standard Parts Listings

C Series Centrifugal Pumps
752 KB

Not available at this time.

DC10 Washdown 12 Volt Pump Support

C41 Pump Manual Standard Parts Listings

DC10 Washdown 12 Volt Pump
437 KB

Not available at this time.

D51 • D61 • D71 • D91 Series Support

Pump Manual Standard Parts Listings

D51CD Manual (486KB)
D51DM Manual (593KB)
D61DE Manual (390KB)
D71DE Manual (772KB)
D91EF Manual(510KB)

Not available at this time.

X Series Support


NOTE: Check back if the requested manual is not yet available.

If you do not have the Adobe Acrobat Reader, click here Click here to go to Adobe and download Acrobatto download the most recent version from Adobe, then make your selection.

Standard Motor Information and Support

Motor Type
Primary Uses
Horizontal Rigid Base Motors

Flex Coupled Pumps

36 Frame C-Face Motor

P31 Series Pumps

80/42 Frame D3 (Dual Faced) Style Motors

C Series
E Series
T31 Series

56C Frame C3 Style Motors

T41 Series
T51 Series

C15 Motor

T41 Series
T51 Series

Manuales Traducidos Españoles

Bombas De la Serie T31(624 KB)
(.5 - 10 GPM up to 300 Feet)
Bombas De la Serie E41 • T41 (867 KB)
(1 - 24 GPM up to 600 Feet)
Bombas De la Serie E51 • T51 (863 KB)
(1 - 40 GPM up to 700 Feet)
140•;180 240•;280
Bombas De la Serie 140•180 (652 KB)
Bombas De la Serie 240•280 (676 KB)
(1 - 60 GPM up to 800 Feet)
150•;160•;170 250•;260•;270
Bombas De la Serie 150•160•170 (662 KB)
Bombas De la Serie 250•260•270 (683 KB)
(5 - 150 GPM up to 1150 Feet)
M50 & L50
Bombas De la Serie M50 & L50 (1.53 MB)

(1 - 40 GPM up to 2300 Feet)
Bombas De la Serie C (249 KB)
(10 - 100 GPM up to 140 Feet)

Product Returns for Repair

In the event that a product return for factory repair is indicated, your Representative or Distributor can arrange this for you and explain the returns procedure. Please consult your product manual for details on warranty limitations and status. For product returns, please be prepared to answer questions about the pump serial#, (see the "How to Identify your Pump" page) application details (fluid mix, pressure, capacity, temperature, duty cycle, etc.), and any other symptoms and indications that might help us determine the root cause of the problem, and avoid it in the future. If you require complete failure analysis, please return the pump in an assembled and unaltered condition. The actual disassembly process often gives indications of failure modes so this is very important to consider. In some circumstances, customer disassembly may void your warranty.

Also be aware that for the safety of our personnel, and to meet OSHA requirements, we require a disclosure of the composition of the fluids pumped before an RMA authorization will be issued. The customer is then required to send an MSDS sheet in advance (or on the outside of the pump return packaging), and then thoroughly flush the unit if the fluid is anything other than clean water or ethylene glycol.

Product returns will generally be processed within a few days of receipt and a faxed advisement will be sent with our findings and recommendations. Expedited return and repair may be arranged upon special request. To request an RGA (Return Goods Authorization) number, please click here to submit a request.

ISO Certification

ISO Certification

Quality Policy

MTH is committed to its Quality Management System as a tool to ensure the achievement of the company mission, and satisfaction of agreed upon customer requirements.

The MTH Quality Management System is designed around a continuous improvement process where goals are set, resources provided, risk is assessed, work is completed, and success is measured.

Mission Statement

MTH Tool Company, Inc. is a customer-oriented manufacturer of regenerative turbine pumps that strives to create value for its customers and employees by building mutually beneficial and enduring relationships with its customers and suppliers. MTH Tool Company, Inc.’s core mission statement is as follows:

We will create and build a company:

  • To Lead the pumping industry in regenerative turbine and OEM pump design and manufacture by producing products with superior performance, high reliability, and low cost.

  • To Respond to the needs of customers with products and services provided in a timely, professional, and intelligent manner.

  • To Succeed in its commitments to self-improvement and growth in status as a Quality Company that is Environmentally Responsible and Socially Conscious.

  • To Provide a safe, rewarding and positive work environment for all members of our Team.

Limited Warranty (WI-7.2.3-04)

Revision: 2016.08.16

MTH makes good faith recommendations of Products, based on its experience and the application information provided by the Purchaser. However, the responsibility for testing and approving a Product to be used for a particular purpose lies with the Purchaser.

The obligations of MTH Tool Company, Inc. (hereinafter referred to as "MTH"), with respect to a "Product" (defined below) are limited as set forth herein.

ALL IMPLIED WARRANTIES, including the "implied warranty of merchantability" and the "implied warranty of fitness for a particular purpose" are HEREBY DISCLAIMED.

There are no warranties which extend beyond the description on the face hereof.

MTH warrants that, during the "Warranty Period" (defined below), the "Product" (defined below) will not fail to meet the "Operational Specifications" (defined below), within applicable industry tolerances established by the Hydraulic Institute, due to defects in its materials and workmanship. MTH does not warrant that any Product will meet the "Operational Specifications" in conditions other than the Standard Operating Conditions, unless agreed to by MTH in a signed writing.

For all purposes of this Limited Warranty:

(a) The term "Warranty Period" shall mean the twelve (12) month period from the date of shipment from MTH to the Purchaser (the "Warranty Period").

(b) The term "Product" shall mean: any item or assembly of items sold by MTH that are either manufactured or selected by MTH to meet the "Operational Specifications". The term "Product" does not include any item, assembly of items, or portion of such assembly that is selected or specified by any entity other than MTH, or that MTH has identified as ineligible for warranty coverage.

(c) The term "Purchaser" shall mean the original person(s) or entity that issued the purchase order to MTH, for the Product. .

(d) The term "Operational Specifications" shall mean the specified dimensions, material composition, and performance parameters of a Product, as published by MTH, or as otherwise agreed in a signed writing between MTH and Purchaser. "Standard Operating Conditions", for pumps, shall mean: operating with clean water, at standard temperature and pressure. "Operational Specifications" shall not include visual appearance or any other parameters not expressly agreed to in writing.

If, within the Warranty Period, a Purchaser believes that a Product has failed to meet its Operational Specifications, the Purchaser must request a Return Goods Authorization ("RGA") in the manner specified at, and supply any additional information MTH might reasonably request. If the Product was purchased through a distributor or any entity other than MTH, the RGA request must be made through that entity. Any Product returned without an RGA will be refused at the dock. Products authorized for return must be properly packaged to prevent further damage, clearly marked with the Return Goods Authorization "RGA" number provided by MTH, and shipped freight prepaid and allowed, F.O.B. the MTH factory at Plano, Illinois, USA.

MTH may, in its sole discretion, deny any warranty claim if shipping damage, any attempted disassembly, or any other action outside of MTH's control impairs MTH's determination of the existence of, or cause of a claimed failure.

Notwithstanding anything to the contrary in this Limited Warranty, MTH shall have no obligation to repair or replace any Product it determines to have any defects arising from or attributable to: (1) abrasion, corrosion, or erosion arising after shipment from MTH; (2) improper handling, packaging, installation, storage, or maintenance, after it is shipped by MTH; (3) repairs or alterations outside of MTH's factory, in any manner, without MTH's written authorization; (4) misuse, negligence, or accident after shipment from MTH; (5) use in a manner inconsistent with MTH's published instructions and Operational Specifications, or other written specifications agreed to by both Purchaser and MTH; or (6) incorrect power supply or power quality. MTH's determination with respect to the applicability of this Limited Warranty to any particular defect or Product shall be final and conclusive.

If, after examination by an authorized representative of MTH, MTH determines that the Product failed to meet the "Operational Specifications", within applicable industry tolerances established by the Hydraulic Institute, due to defects in its materials and workmanship, during the Warranty Period, then MTH will, at its option, ship a repaired or replaced Product to the Purchaser, F.O.B. MTH's factory in Plano, Illinois, U.S.A., freight prepaid and allowed. MTH will use a freight provider of its choosing, via a method no slower than that used for shipping the Product to MTH. MTH may, at its sole discretion, issue a credit memo to Purchaser for some or all Purchaser's shipping costs to return a defective Product to MTH.

MTH accepts no responsibility for costs associated with removal and reinstallation of Products.

Under no circumstances shall MTH be liable for incidental or consequential damages.

MTH neither assumes responsibility for, nor authorizes any person to assume for it, any other obligation in connection with the sale of any Product or any enlargement of this Limited Warranty.

Some States do not allow the exclusion or limitation of incidental or consequential damages. So, the above limitations or exclusions might not apply to you. This warranty gives you specific legal rights, and you might, also, have other rights, which vary from State to State.

By using this Product, you agree that this Limited Warranty is governed by the laws of the State of Illinois; that this Limited Warranty shall be interpreted and enforced only in accordance with the laws of the State of Illinois (excluding its conflicts of law provisions); and that you submit yourself to the jurisdiction of the 23rd Judicial Circuit, Kendall County, Illinois, which shall have exclusive jurisdiction over any controversy or dispute arising under or with regard to this Limited Warranty.

Standard Terms and Conditions of Sale (WI-7.2.3-07)

Acceptance of any purchase order by MTH Tool Company, Inc / MTH Pumps (hereinafter referred to as "MTH") is expressly conditional upon Purchaser’s acceptance of our MTH Standard Terms and Conditions of Sale, which consists of, but is not limited to: this document, the MTH Limited Warranty (see WI-7.2.3-04, Limited Warranty), sales quotations, sales order acknowledgements, written instructions, and other applicable documents or written communications provided by, or originating from authorized MTH personnel.

MTH expressly denies and takes exception to all customer terms and conditions of purchase. Acknowledgement of customer purchase orders or fulfillment of those orders by MTH do not indicate acceptance of any customer terms or conditions of purchase. Attempts to use acceptance, acknowledgement, or fulfillment of a purchase order to bind or commit MTH to terms and conditions other than its own are expressly denied.

Copies of the MTH Standard Terms and Conditions of Sale have been provided to the customer, so orders should not be placed with MTH if there is disagreement with our terms and condition of sale.

Exceptions to our Standard Terms and Conditions of Sale may only be made in a writing signed by an MTH corporate officer.

MTH Conflict Minerals Policy

MTH Pumps, Inc. is committed to sourcing responsibly and considers mining activities that fuel conflict as unacceptable. MTH’s efforts related to conflict minerals are aligned to the work of the Responsible Minerals Initiative, an initiative of the Responsible Business Alliance and the Global e-Sustainability Initiative. The RMI’s work includes the Conflict-Free Smelter Program and the Conflict Minerals Reporting Template.

California Proposition 65

Effective Date: 30 August 2018

MTH Tool Company, Inc. (hereinafter referred to as "MTH") is committed to comply with all laws and regulations pertaining to its operations and its products. One such regulation is the State of California Proposition 65.

Q: What is California Proposition 65 and what are the requirements?
A: In 1986, California voters approved the Safe Drinking Water and Toxic Enforcement Act known as Proposition 65. Proposition 65 mandates that the Governor of California maintain and publish a list of chemicals that are known to cause cancer, birth defects and/or other reproductive harm. The list, which must be updated annually, includes a wide variety of chemicals that can be found in dyes, solvents, drugs, food-additives, by- products of certain processes, pesticides and tobacco products. A company with ten or more employees that operates within the State of California (or sells products in California) must comply with the requirements of Proposition 65. To comply, businesses are: (1) prohibited from knowingly discharging listed chemicals into sources of drinking water; and (2) required to provide a "clear and reasonable" warning before knowingly and intentionally exposing anyone to a listed chemical. In 2017, California updated the warning rules and products containing Proposition 65 substances must now carry a new warning statement unless they can be shown to not have an exposure risk.

Warning short form - Example

Q: Why do some MTH products have a Proposition 65 warning on them?
A: A Proposition 65 warning means one of two things: (1) the business has evaluated the exposure and has concluded that it exceeds the "no significant risk level"; or (2) the business has chosen to provide a warning simply based on its knowledge about the presence of a listed chemical without attempting to evaluate the exposure.
MTH and many of its manufacturing partners have chosen to provide a warning based on its knowledge about the presence of one or more listed chemicals without attempting to evaluate the level of exposure. With MTH’s products, the exposure may be negligible or well within the “no significant risk” range.
However, out of an abundance of caution, MTH has elected to place the Proposition 65 warning signs on its products if applicable or potentially applicable.
MTH is committed to providing safe, high quality products for our customers and we have worked with our suppliers and our supply chain partners to ensure the purchase of raw materials that will meet Prop 65 standards and our labelling.

Q: How can customers trust that our product is safe?
A: If a Proposition 65 warning is posted on the product or product packaging, it means that one or more listed chemicals is present in the product in some quantity. The California state government has clarified the statute by stating that “The fact that a product bears a Proposition 65 warning does not mean by itself that the product is unsafe.” California has also explained, “You could think of Proposition 65 more as a ‘right to know’ law than a pure product safety law.” See

It is the responsibility of the user to determine the suitability of the subject product for any particular use or application. If you have any questions or concerns regarding the Proposition 65 warning, please contact us. Home, Find a Pump Type, Find Your Application, Standard Products, How to Buy Our Pumps,
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630-552-4115 • Fax:630-552-3688 • Business Hours: M~F 8AM to 5PM Central Time