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3" Electric Diaphragm Water Pump

1.5HP 115/230v OBS
Model Number
electric mud diaphragm pump 3" 337e-96

AMT 335E-96

Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. 335 pumps are OBS replaced by 335.

OBSOLETE, see other models. Parts are still available. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slurry, sewage, and thick liquids that have the ability to flow. Often used at marina's instead of a macerator. For portable toilet and sewer contractors on a honey wagon. AMT Diaphragm pumps are available with a choice of drivers. 115/230v motor with On / Off switch is weatherproof. Motor is factory wired with a 20' cord and plug for 115v. Can be field changed to 230v. 3355-96 335E-96 3p682 337E-96

Built-in molded polyurethane flapper/check valve assures self-priming to 20 feet after initial prime. Heavy duty gear box is designed to operate pumps at 40 strokes per minute for electric motor.. Each unit includes a 3" NPT steel suction strainer, two 3" NPT nipples, and wheel kit with 10" semi-pneumatic transport wheels for portability. Pumps are designed for use with non-flammable liquids which are compatible with pump component materials. Suction and discharge port size cannot be reduced.

  • Sand Cast Aluminum Construction for Portability and Durability
  • Thermoplastic Rubber Diaphragm
  • 3" NPT Suction and Discharge
  • 1 5/8" Diameter Solids Handling Capability
  • Modular Component Design Permits Easy Maintenance and Cleanout
  • Delivers up to 90 GPM
  • Self cleaning flow path

As a alternate in a centrifugal pump design see


See Curve "D"

Series: Mud Pumps Gas Electric Diaphragm 
Suction and discharge port size cannot be reduced. Due to positive pumping action of diaphragm pumps, by all mfr's, the discharge is recommended to only be 25FT long unless oversized. Discharge can not be restricted. There is no relief valve.
More Information
Model Number 335E-96
part number 335E-999-96
Series Mud Pumps Gas Electric Diaphragm Pumps
Max Flow (GPM.) 58
Max Flow GPH 3480
TDH Maximum (Ft) 25
TDH Maximum (PSI) 11
Horse Power (HP) 1 1/2
Horsepower (IE .5, 1, 1.5, 20) 1.5000
Inlet Connection Type FNPT
inlet size 3"
Inlet (In.) 3
Outlet Connection Type FNPT
Outlet (In.) 3
Wetted Materials Aluminum
Elastomers / O-ring Neoprene
Diaphragm Santoprene
Voltage (V) 115/230
Voltage (Range) 110-120/220-240
Phase (Ø) Single (1)
Motor Frequency 60/50
Motor TEFC
Speed (RPM.) 1725
Motor Frame 56C
Self Priming Yes
Suction Lift (FT.) 20
Max Operating Temperature (F) 180
Viscosity Catsup 3000.00 cp 20000.00 ssu
Length (In.) 42.200000
Mechanical Seal No
Impeller Number (In.) D
Other Hi Torque Motor: 115/230 VAC 1-Phase Motor with Manual Thermal Overload Protectionand. 20FT 115 Contractor plug power cord and weather proof On/Off switch. Never restrict discharge hose since damage to diaphragm may occur. Do not use long hose, see manual.
Cord Length (Ft.) 6
Drain Yes
Port Rotation Yes
Country of Manufacture United States
Weight (Lbs) 186.000000
Quick Ship Yes
Warranty (YRS.) 1
GPM Of Water At 10 Feet Of Head 50

Supporting Docs

Supporting Docs
(Size: 1.07 MB) Extension: pdf

AMT Pump Company is A Subsidiary of The Gorman-Rupp Company located in Mansfield, Ohio. AMT offers over 1000+ different standard model numbers of which 400+ are readily available and offered as QSP, Quick Ship Products. AMT manufactures and sells Industrial / Commercial pumps & accessories through authorized distributors.

Virtually every product AMT sells is engineered and designed by the company. Pump components are machined, assembled and tested at the Royersford, Pennsylvania facility.

AMT’s unique designs and patented products have made the company the industry leader for their high quality pumps.