General Pump TSF2021 Triplex Pump Assembly – 8.5 GPM, 3,600 PSI

Part Number: 85.139.071B
Bare Pump Part #: 85.130.071
Pump Model: TSF2021
Pump Type: Triplex | Belt Drive | Gas / Electric Compatible

High-Volume, Low-RPM Triplex Pump for Heavy-Duty Professional Cleaning

The General Pump TSF2021 Triplex Pump Assembly is built for high-flow, industrial-grade cleaning applications where maximum water volume and long service life are critical. Delivering 8.5 GPM at 3,600 PSI, this belt-drive triplex pump is ideal for contractors, industrial operators, and large-scale commercial cleaning systems.

Designed with a low-RPM belt-drive platform (1,750 RPM), the TSF2021 runs cooler, quieter, and lasts significantly longer than direct-drive pumps. Featuring a brass manifold, ceramic plungers, external unloader, and adjustable soap injection, this pump is engineered for continuous-duty performance. Backed by a 5-year warranty, it’s a proven solution for demanding environments.

Key Features

• High-Volume Output
  8.5 GPM flow delivers exceptional rinsing power and faster job completion

• Low RPM Belt Drive (1,750 RPM)
  Reduced heat, vibration, and wear for extended seal, bearing, and plunger life

• Triplex Ceramic Plungers
  Smooth operation with excellent resistance to heat and abrasion

• Brass Manifold
  Superior corrosion resistance, strength, and heat dissipation

• External Unloader (85.300.033)
  Easier pressure adjustment, servicing, and replacement

• Adjustable Soap Injector (85.400.000)
  Controlled chemical application for enhanced cleaning performance

• Gas or Electric Drive Compatible
  Designed for belt-drive systems powered by gas engines or electric motors

Specifications

Built for Professional & Industrial Use

At the core of the TSF2021 is a triplex plunger system that delivers smooth, consistent water flow while reducing stress on internal components. The ceramic plungers resist heat and wear, protecting seals and extending pump life under continuous use.

With 8.5 GPM, this pump excels in applications where water volume matters as much as pressure—making it ideal for large surface cleaning, heavy equipment washing, and high-output rinse systems.

Heavy-Duty Construction

• Brass manifold for long-term corrosion resistance and structural strength

• Ceramic plungers to withstand high temperatures and heavy use

• 24 mm solid shaft for secure belt-drive connection

• 42 lb heavy-duty build for stability and durability in industrial systems

This robust construction makes the TSF2021 a dependable long-term solution for professional contractors and industrial facilities.

Operator-Focused Design

• External unloader (85.300.033) allows precise pressure regulation and easier servicing

• Adjustable soap injector (85.400.000) enables flexible detergent application

• 3/8" brass QC discharge (85.300.108) ensures fast, leak-free hose connections

• Optional thermal relief valve (85.300.023) protects the pump during extended bypass operation

Low RPM Advantage

Operating at 1,750 RPM, the TSF2021 runs significantly cooler than high-speed direct-drive pumps. This reduces internal heat buildup, extends seal and bearing life, lowers noise levels, and allows for longer continuous run times—ideal for industrial and commercial cleaning operations.

Maintenance & Service

• Requires 37 oz of 30W non-detergent oil

• Simple oil checks and scheduled changes maximize pump life

• Serviceable components and rugged construction minimize downtime

• Rated for inlet water temperatures up to 165°F (74°C)

Typical Applications

• Industrial Cleaning: Equipment, machinery, and plant wash-down

• Fleet Maintenance: Trucks, buses, trailers, and service vehicles

• Agriculture: Tractors, harvesters, and large farm equipment

• Construction: Jobsite equipment, tools, and concrete residue

• Property Maintenance: Parking lots, large exteriors, and walkways

• Surface Preparation: Paint, coatings, grease, and buildup removal