How to Read MTH Pumps Model Numbers

Regenerative Turbine Pumps

Typically MTH's Regenerative Turbines all use the same standard format for our modeling number system.

The first character indicates the pump family. The second character indicates the approximate impeller size. The third character indicates the number of stages the pump has.

P31 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - Top Suction • Top Discharge

Wet end rotation to the motor

Adjustable impeller clearances
Optional built-in relief valve

Sample Model Number	P31C-SS
Model Breakdown	P	3	1	C	-SS
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Regenerative Turbine - Adjustable Casing	3-inch	1	C	Stainless Steel - SS

T31 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor
Pedestal Mounting also available

Available in Sealless Canned configuration

Sample Model Number	T31A-AB
Model Breakdown	T	3	1	A	-AB
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Close Coupled Regenerative Turbine Pumps	3-inch	1	A through H	All Bronze - AB Stainless Steel - SS

T41 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor
Pedestal or Flange Mountings also available

Available in Sealless Canned configuration
Seal Cooling Jacket Available

Sample Model Number	T41C-BF
Model Breakdown	T	4	1	C	-BF
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Close Coupled Regenerative Turbine Pumps	4-inch	1	B through P	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

E41 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor
Flange Mountings also available

Up to 3 HP motor

Sample Model Number	E41G-SS
Model Breakdown	E	4	1	G	-SS
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Close Coupled Regenerative Turbine Pumps w/ D3 Motors	4-inch	1	B through P	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

T51 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor
Pedestal or Flange Mountings also available

Available in Sealless Canned configuration

Sample Model Number	T51L-AI
Model Breakdown	T	5	1	L	-AI
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Close Coupled Regenerative Turbine Pumps	5-inch	1	B through R	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

E51 Series

Standard Configuration

Optional Configurations

Special Features

Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor
Flange Mounting also available

Up to 3 HP motor

Sample Model Number	E51J-SS
Model Breakdown	E	5	1	J	-SS
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Close Coupled Regenerative Turbine Pumps w/ D3 Motors	5-inch	1	B through R	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

M50 Series

Standard Configuration

Optional Configurations

Special Features

In-line Vertical Close Coupled - Top Suction • Top Discharge

Horizontal Close Coupled and Pedestal mounting also available

Available in Reverse Circulation Sealless Canned configuration

Sample Model Number	M53R-BF
Model Breakdown	M	5	3	R	-BF
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Multi-stage Regenerative Turbine	5-inch	1 2 3 4 5	B through R	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

L50 Series

Standard Configuration

Optional Configurations

Special Features

In-line Vertical Close Coupled - Top Suction • Top Discharge

Horizontal Close Coupled and Pedestal mounting also available

Available in Reverse Circulation Sealless Canned configuration

Sample Model Number	L54G-SF
Model Breakdown	L	5	4	G	-SF
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	Low NPSH Inducer Style Multi-stage Regenerative Turbine	5-inch	1 2 3 4 5	B through R	All Bronze - AB Bronze Fitted - BF All Iron - AI Stainless Steel - SS Stainless Fitted - SF

100• 200 Series

Standard Configuration

Optional Configurations

Special Features

Horizontal Flexible Coupled

Top Suction • Top Discharge (140 • 180 • 240 • 280)
Top Suction • End Discharge (150 • 160 • 170 • 250 • 260 • 270)

Reverse Circulation Sealless Canned configuration coming 2007

Sample Model Number	143H-BR
Model Breakdown	1	4	3	H	-BR
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	Impeller/water channel indicator	Material
Breakdown Options	1 - Flexible Coupled Multi-stage Regenerative Turbine 2 - Low NPSH Inducer Style Flexible Coupled Multi-stage Regenerative Turbine	4 - 4inch (approx.) 5- 5inch (approx.) 6- 6inch (approx.) 7- 7inch (approx.) 8 - 4inch (Double Thickness)	1 2 3 4	D through R	All Bronze - AB Bronze Fitted - BF Bronze Ring - BR All Iron - AI Stainless Steel - SS

Centrifugal Pumps

C Series

Standard Configuration

Optional Configurations

Special Features

Horizontal Close Coupled - End Suction • Top Discharge

Wet end rotation to the motor

Flange Mountings also available
Investment Cast Stainless Steel

Sample Model Number	C41DE
Model Breakdown	C	4	1	DE
Breakdown Definitions	Pump Series	Impeller size (approx.)	Number of Impellers (Stages)	XX - (Discharge X Inlet)
Breakdown Options	Centrifugal Pumps	4 - 4inch (approx.) 5- 5inch (approx.) 6- 6inch (approx.)	1	AB - 1/2" X 3/4" BC - 3/4" X 1" CD - 1" X 1 1/4" DE - 1 1/4" X 1 1/2" EF - 1 1/2" X 2"