Generac T20-S Trash Water Pump & Repair Parts

The Generac T20-S trash water pump and repair parts are available here at Ken’s Distributing Company, giving you a single source for the complete pump, every replacement component, and the technical support you need to keep this professional-grade machine running at full capacity. Whether you are purchasing a new Generac T20-S trash water pump or sourcing specific repair parts after heavy field use, this page covers the complete pump unit, pump assembly, and hoses and hardware parts lists for the T20-S.

Always use your unit serial number when ordering Generac T20-S repair parts to ensure you receive components matched to your specific pump build. Contact the Kendisco team at 303-699-7845 or submit a quote request online for current pricing and parts availability.

Generac T20-S Trash Water Pump: Product Overview

The Generac T20-S is a professional-grade wet-prime trash water pump engineered for the toughest and dirtiest fluid transfer applications on active job sites. Powered by a 211cc Generac G-Force engine, the T20-S pumps up to 185 gallons per minute and handles solids up to 1 inch in diameter, making it a capable and reliable choice for construction dewatering, emergency flood response, municipal bypass pumping, and large-scale industrial water management.

The wet-prime design ensures straightforward startup and continuous pumping without manual repriming between cycles. A large 3-gallon fuel tank with integrated fuel gauge provides approximately 5 hours of runtime per fill, and color-coded suction and discharge ports reduce connection errors in the field. The silicon carbide mechanical seal delivers long service life even under the continuous high-volume pumping demands typical of construction and industrial applications.

Generac T20-S Trash Water Pump: Key Specifications

Generac T20-S Trash Water Pump: Key Features

• Generac G-Force 211cc Engine: Powerful engine with low-oil shutdown protection prevents engine damage during unattended or extended pumping operations
• Up to 185 GPM Flow Rate: High-volume output suited to construction dewatering, flood water removal, and large-scale site water management tasks
• 1 Inch Solids Handling: Passes solids up to 1 inch in diameter, making it suitable for muddy water, sandy conditions, and debris-laden water that would damage or block a semi-trash or clean water pump
• Silicon Carbide Mechanical Seal: Long-life seal material resists wear, heat, and abrasive particles encountered in trash pumping applications
• 3-Gallon Fuel Tank with Gauge: Large-capacity tank with integrated fuel gauge provides approximately 5 hours of runtime and eliminates guesswork during extended pumping operations
• Color-Coded Ports: Blue discharge and green suction port identification prevents incorrect hose connection in the field
• 1 Inch Heavy-Duty Frame: Robust frame construction withstands the vibration, impact, and rough handling common to active construction and industrial job sites
• Onboard Operator Instructions: Icon-based instructions at key touch points allow operators to use and service the pump without needing to consult the manual in the field
• Wet-Prime Technology: Reliable startup without manual repriming between pumping cycles, reducing operator intervention and keeping operations running continuously

Generac T20-S vs. Generac PRO 2 Inch Semi-Trash Pump vs. Generac PRO XC3000P: Choosing the Right Pump

Kendisco stocks the full range of Generac wet-prime pumps. The table below helps you identify which model matches your job requirements based on flow rate, solids handling, and application type.

Pump Unit Assembly

Pump Assembly

The pump assembly parts listed below cover the discharge flange, mechanical seal, impeller, volute, flap valve, intake valve seat, pump housing, and all associated hardware for the Generac T20-S trash water pump. The mechanical seal, flap valve, and O-rings are the most frequently serviced components in this assembly. Always reference your serial number when ordering.

Hoses and Hardware

The hoses and hardware assembly covers all connection components, clamps, filter net, and suction and discharge hoses included with the Generac T20-S trash water pump. The color-coded suction and discharge hoses match the pump port markings, reducing the risk of incorrect connection during setup.

Most Commonly Replaced Repair Parts on the Generac T20-S Trash Water Pump

The following components are most frequently replaced during routine maintenance and after extended heavy use on the Generac T20-S trash water pump. Keeping these parts on hand reduces downtime and keeps your pump ready for deployment.

• Mechanical Seal Set (0L63370130): The silicon carbide mechanical seal is a primary wear item. Inspect at each major service and replace if leakage is detected at the seal area or if pump output drops without another identifiable cause
• Flap Valve (0L63370140): Controls fluid flow at the intake. Replace if the pump loses prime easily, shows reduced output, or fails to maintain consistent flow during operation
• Intake Valve Seat (0L63370142): Replace alongside the flap valve for a complete intake service and to ensure a proper valve seating surface
• Volute O-Ring 1 (0L63370131) and Volute O-Ring 2 (0L63370137): Replace both O-rings whenever the volute is disassembled to maintain a leak-free pump assembly
• Pump Body O-Ring (0L63370136): Replace whenever the pump housing is opened during service
• Easy Prime Cap O-Ring (0L63370118): Replace if the Easy Prime system shows air leakage or reduced priming effectiveness
• Discharge Flange Gasket (0L63370115): Replace if leakage is detected at the discharge flange connection
• Discharge Valve Sealing Gasket (0K96270124): Inspect and replace at each pump assembly service
• Muffler Gasket (0L63360112): Replace if exhaust leakage is detected at the muffler joint during engine operation
• Hose Filter Net (0K95700137): Clean or replace regularly to prevent intake restriction and maintain full pump flow rate
• Fuel Filter In Tank (0K95700145): Replace annually or if fuel delivery to the engine becomes restricted

Maintenance Guidance for the Generac T20-S Trash Water Pump

Keeping the Generac T20-S trash water pump in reliable working condition requires consistent attention to both the engine and pump assembly. The following maintenance schedule applies to normal operating conditions. In heavy or continuous use environments, shorten inspection intervals accordingly.

• Before each use: Check engine oil level, inspect suction and discharge hoses for damage or wear, clean the hose filter net, and confirm the Easy Prime cap and O-ring are secure and intact
• Every 25 hours: Change engine oil. Inspect all frame fasteners, vibration mounts, and cylinder vibration mount for tightness and condition
• Every 50 hours: Inspect the mechanical seal area for signs of leakage. Check the flap valve and intake valve seat for wear or damage. Inspect pump cover O-ring and replace if compressed or cracked
• Every 100 hours: Inspect the impeller and volute for wear or erosion. This is particularly important when the pump has been operating in sandy or abrasive water conditions where internal wear accelerates
• Annually or as needed: Replace the in-tank fuel filter (0K95700145), inspect all O-rings and gaskets, service the Easy Prime cap O-ring, and inspect the discharge flange gasket and valve seating gasket
• After extended storage: Drain the fuel system using the fuel shutoff valve (0H3384) before storage. Inspect all seals and O-rings before returning the pump to service. Check for gum or varnish deposits in the fuel system if stored without fuel stabilizer

Common Service Questions for the Generac T20-S Trash Water Pump

What is the maximum flow rate of the Generac T20-S trash water pump?

The Generac T20-S trash water pump delivers up to 185 gallons per minute under optimal operating conditions. Actual flow rate varies depending on total head height, discharge hose length and diameter, fluid type, and the volume of solids present in the water being pumped.

What size solids can the Generac T20-S handle?

The Generac T20-S is engineered to pass solids up to 1 inch in diameter. This makes it suitable for muddy water, sandy water, water containing debris and sediment, and general construction site water that would clog or damage a semi-trash or standard clean water pump. For applications requiring passage of solids larger than 1 inch, the Generac PRO XC3000P with its 1.2 inch solids handling capability is a better fit.

How does the Generac T20-S differ from the Generac PRO 2 inch semi-trash pump?

The Generac T20-S is a full trash pump with 1 inch solids handling and a higher flow rate of up to 185 GPM, powered by a 211cc engine. The Generac PRO 2 inch semi-trash pump handles soft solids and light debris only, delivers up to 158 GPM, and uses a smaller 169cc engine. The T20-S is the right choice when solid particle size and higher flow volume are requirements for the job.

What type of mechanical seal does the Generac T20-S use?

The Generac T20-S trash water pump uses a silicon carbide mechanical seal set (part 0L63370130). Silicon carbide provides significantly longer service life than standard seal materials in trash pump applications because it resists the wear caused by abrasive particles, debris, and the continuous high-volume operation typical of construction and industrial dewatering use.

How long does the Generac T20-S run on a full tank of fuel?

The 3-gallon (11.5L) fuel tank provides approximately 5 hours of runtime under normal operating conditions. Actual runtime varies based on engine load, throttle position, and engine condition. The integrated fuel gauge allows monitoring of fuel level without stopping the pump.

Where can I order Generac T20-S trash water pump repair parts?

Ken’s Distributing Company stocks genuine Generac T20-S trash water pump repair parts and can assist with part identification using your unit serial number. Contact the Kendisco team at 303-699-7845 or submit a quote request online. Always provide your serial number when ordering to ensure compatibility with your specific pump build and production date.

Industries and Applications for the Generac T20-S Trash Water Pump

The Generac T20-S trash water pump is a versatile professional-grade pump used across a wide range of industries where high-volume water removal and reliable solids-handling performance are required in demanding field conditions.

• Construction and Dewatering: Removes groundwater, stormwater, muddy water, and debris-laden water from active excavations, foundations, trenches, and construction sites
• Emergency Flood Response: Up to 185 GPM output enables rapid water removal in flood cleanup and emergency dewatering situations where continuous high-volume pumping is needed
• Municipal Bypass Pumping: Supports sewer bypass, storm drain management, and infrastructure maintenance operations for municipal utility and public works crews
• Agriculture and Irrigation: Transfers water from ponds, open ditches, and sources containing suspended sediment or solid material that would restrict a clean water pump
• Mining and Site Work: Manages drainage and groundwater removal from active mine sites and heavy civil construction projects where solids-laden water is a constant challenge
• Industrial Facility Maintenance: Removes process water, wash-down water, and floor drainage in manufacturing plants, refineries, and heavy industrial facilities

Order Generac T20-S Trash Water Pump and Repair Parts from Kendisco

Ken’s Distributing Company is your trusted source for the Generac T20-S trash water pump and all genuine replacement parts across the complete pump unit, pump assembly, and hoses and hardware. Whether you need the complete pump, a mechanical seal set, impeller, flap valve, Easy Prime components, or any item from the parts tables on this page, the Kendisco team has the inventory and expertise to support your order.

Call Ken’s Distributing Company at 303-699-7845, submit a quote request online, or use the parts tables on this page to identify the components you need. Always provide your unit serial number when ordering repair parts to confirm compatibility with your specific Generac T20-S trash water pump build.