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Product / Pressure Washers / 85.139.005B

General Pump TSS1511 Triplex Pump – 4.0 GPM, 4,000 PSI, 24 mm Shaft

General Pump TSS1511 Triplex Pump – 4.0 GPM, 4,000 PSI, 24 mm Shaft

Specifications

UNLOADER

External 85.300.037

WARRANTY

5 Years

RPM

1,450

PUMP MODEL

GP TSS1511

PUMP TYPE

Triplex

Oil Type

30W Non Detergent

Oil Capacity

37 oz

Thermal Relief Value

85.300.023

Max Inlet Temperature

74°C / 165°F

Manifold Type

Brass

Soap Injector

Adjustable 85.400.000

Discharge Size

3/8" Brass QC 85.300.108

Inlet Size

3/4" GHF

Plunger Piston

Ceramic

Unloader Type

External 85.300.037

Max GPM

4.0

Shaft Size

24 mm

Weight

32 lbs

Belt Drive

Gas / Electric

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PRODUCT

DESCRIPTION

Heavy Duty Belt Drive Pump for Pro Use

The General Pump TSS1511 Triplex Pump Assembly (Bare Pump Part #85.130.005) is a pro grade belt drive triplex plunger pump built for maximum durability, smooth performance and reliable output. Up to 4,000 PSI at 4.0 GPM this pump is for contractors, commercial operators and industrial users who need high cleaning power and steady water flow.

Built by General Pump (GP) one of the most respected manufacturers in the industry the TSS1511 is engineered with a brass manifold, ceramic plungers and an external unloader for long lasting reliability, corrosion resistance and precise pressure control. Runs at low RPM (1,450) for extended life and backed by a 5 year warranty it’s the pro’s choice for tough cleaning jobs.

Features

  • Bare Pump Part #: 85.130.005

  • Manufacturer: General Pump (GP)

  • Model: TSS1511

  • Pump Style: Triplex, belt drive

  • Drive Type: Gas/Electric compatible

  • Max Pressure: 4,000 PSI

  • Max Flow Rate: 4.0 GPM

  • Shaft Size: 24 mm

  • Unloader Type: External (85.300.037)

  • Plunger (Piston): Ceramic for durability and heat resistance

  • Inlet Size: 3/4" GHF (garden hose fitting)

  • Discharge Size: 3/8" Brass QC (85.300.108)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Type: Brass

  • RPM: 1,450

  • Max Inlet Temp: 74°C / 165°F

  • Thermal Relief Valve: 85.300.022

  • Oil Capacity: 37 oz

  • Oil Type: 30W non-detergent oil

  • Weight: 32 lbs

  • Warranty: 5 Years

Pro Built

The triplex plunger design is smoother, more efficient and longer lasting than axial pumps. With three ceramic plungers the TSS1511 can withstand high temperatures and abrasion, protecting seals and internal components during extended use.

Rated for 4,000 PSI and 4.0 GPM this pump has the power for tough industrial cleaning and the efficiency for covering large areas. The belt drive system runs slower, wears less and is quieter than other pumps for heavy duty continuous use.

Built Tough

The TSS1511 is built with rugged materials for professional use:

  • Brass manifold for excellent corrosion resistance and heat dissipation.

  • Ceramic plungers for long life and seal life under high pressure.

  • 24 mm solid shaft for strong and secure compatibility with belt driven systems powered by gas or electric motors.

  • Weighs 32 lbs for long term stability and reliability.

This is why the TSS1511 is the choice for industrial cleaning, commercial car wash systems and agricultural applications.

Operator Friendly

General Pump designed the TSS1511 with operator convenience and system safety in mind:

  • External unloader (85.300.037) for precise pressure control and easy servicing.

  • Adjustable soap injector (85.400.000) for flexible detergent application.

  • Thermal relief valve (85.300.022) to release overheated water during bypass operation.

  • Quick connect brass discharge (3/8” – 85.300.108) for secure and leak free hose connections.

These features ensure safe and efficient operation and reduce downtime in the field.

Low RPM Advantage

Runs at 1,450 RPM cooler, quieter and with less wear than high speed pumps. Lower RPM operation extends the life of seals, bearings and plungers making the TSS1511 a great investment for long term heavy duty use.

Also with a maximum inlet water temperature of 165°F (74°C) it can handle hot water applications for better cleaning.

Maintenance

Easy service for years to come:* Requires 37 oz of 30W non-detergent oil.

  • Oil changes and checks are easy.

  • Equipped with thermal relief valve for automatic overheating protection.

With proper maintenance the TSS1511 will perform and last.

Applications

The General Pump TSS1511 Triplex Pump Assembly is for:

  • Industrial Cleaning – Degreasing and heavy duty wash-down.

  • Fleet Washing – Trucks, trailers, buses and heavy duty vehicles.

  • Car Wash Systems – Belt drive systems that require high PSI operation.

  • Agriculture – Tractors, combines and farm equipment.

  • Commercial Property Maintenance – Parking lots, sidewalks, siding and exterior surfaces.

  • Surface Preparation – Stripping paint, mold and coatings prior to refinishing.

With high PSI, steady water flow and low-RPM durability it’s one of the most versatile belt drive pumps available.

Product Information

  • Part#: 85.130.005

  • Manufacturer: General Pump (GP)

  • Model: TSS1511

  • Style: Triplex, belt drive

  • Drive Type: Gas/Electric compatible

  • Max Pressure: 4,000 PSI

  • Max Flow Rate: 4.0 GPM

  • Shaft Size: 24 mm

  • RPM: 1,450

  • Unloader: External (85.300.037)

  • Soap Injector: Adjustable (85.400.000)

  • Manifold Material: Brass

  • Plunger Material: Ceramic

  • Inlet Connection: 3/4” GHF

  • Discharge Connection: Brass QC 3/8" (85.300.108)

  • Oil Capacity: 37 oz (30W non-detergent oil)

  • Thermal Relief Valve: 85.300.022

  • Max Inlet Temp: 74°C / 165°F

  • Weight: 32 lbs

  • Warranty: 5 Years

General Pump

General Pump is known worldwide for its solid engineering and quality. The TSS1511 Triplex Pump Assembly continues that tradition with low-RPM belt drive, brass manifold, ceramic plungers and external unloader for maximum durability and performance.

With 5 year warranty the TSS1511 is a long term solution for professionals who need big cleaning power and rugged reliability.

When you need maximum power, smooth operation and long life the General Pump TSS1511 is built to deliver—every day, every job.

Frequently Asked Questions about Pressure Washers

How to store a pressure washer?

To ensure the durability of your heavy duty pressure washer:

  • Empty the gas tank to prevent fuel from degrading or clogging the engine.
  • Empty the pump and hoses of any remaining water.
  • Perform necessary maintenance before storage.
  • Store in a dry area.
  • Cover.

What is a pressure washer?

A power washer is a cleaning machine that uses a gasoline engine to power a high pressure water pump and nozzle. It’s used to clean driveways, decks, vehicles, outdoor furniture and more by spraying water at high PSI to remove dirt, grime, mold and other debris.Many models also come with a detergent tank for added cleaning power.

How does a power washer work?

A power washer works by drawing water from a connected hose and pumping it through a high pressure nozzle. The gas engine powers the pump which pressurizes the water and then expels it through the nozzle at high speed to clean the surface. The water pressure is measured in PSI (pounds per square inch) and the flow rate is measured in GPM (gallons per minute).Many models also feature adjustable water pressure settings to cater to different cleaning needs. BE makes pressure washing easy with models available for light jobs and heavy duty commercial cleaning projects.

Gas vs Electric power washers?

The main difference is that a gas pressure washer, known for its cleaning power, is powered by a gasoline engine, making it more powerful and portable, while an electric pressure washer is powered by electricity and is generally quieter and lighter.

Gas pressure washers are for heavy duty and large areas due to their durability, whereas electric pressure washers are for smaller jobs.

Your BE electric pressure washer is perfect for smaller jobs and built for portability, and we offer a wide range of electric models. Included with our electric models is a long extension cord for use anywhere around your house.

What to consider?

When choosing a gas pressure washer consider:

  • Pressure (PSI): More PSI means more cleaning power but also more potential for damaging delicate surfaces.
  • Flow Rate (GPM): More GPM means faster cleaning as more water is dispensed.
  • Engine Power: Bigger engines mean more durability and power.
  • Portability: Weight, handle design and wheel size for easier to move.
  • Nozzles: Multiple spray nozzles to adjust the spray pattern for different tasks.
  • Adjustable Nozzle: Allows for fine-tuning the spray intensity and pattern for various cleaning needs.

How much pressure do I need for?

The required pressure (PSI) and cleaning power depend on the surface you’re cleaning:

  • Light duty (car washing, outdoor furniture): 1,300-1,800 PSI.
  • Medium duty (patios, fences, decks): 2,000-3,000 PSI.
  • Heavy duty (driveways, brick walls, large equipment): 3,000+ PSI.

Many pressure washers come with adjustable pressure settings to handle different cleaning tasks effectively.

Can a pressure washing damage surfaces?

Yes, a power washer can damage surfaces if used incorrectly. High pressure water can strip paint, dent soft surfaces or even cause structural damage if the pressure is too high or the nozzle is held too close to the surface. Always use the right PSI for the material you’re cleaning and keep a safe distance from delicate surfaces.

To prevent damage, consider using a model with adjustable pressure settings.

How to maintain your pressure washer?

To ensure the durability and smooth operation of a pressure washer:

  • Change the oil as per manufacturer’s instructions.
  • Clean or replace the air filter to ensure good airflow.
  • Inspect and clean the nozzle regularly to prevent clogs.
  • Drain the gas tank if you’re storing the washer for a long time.
  • Check the hoses for leaks or damage and replace them if needed.
  • Follow regular maintenance requirements to keep the washer in optimal condition.

Can I use a pressure washer in cold weather and low water temperature?

You can use a pressure washer in cold weather but it’s more difficult. The water flow rate in the hoses and pump can freeze and damage the equipment. If you plan to use your pressure washer in cold temperatures make sure to winterize it and store it in a warm area when not in use. You can also use anti-freeze solutions for pressure washers.

Some models are designed to use hot water, which can be particularly effective for cleaning in cold weather.

Do I need any accessories?

Common accessories for power washers: