AP4 CLASSIC Ultra

AP4 CLASSIC Ultra is stocked & simplified for faster, more predictable lead times

and fast access to replacement parts—so your site projects stay on schedule.

Engineered & Assembled in Dexter, Michigan, USA — held to rigorous manufacturing

standards for quality and reliability you can depend on.

 

Runs longer where standard pumps struggle

 

In severe environments—heavy solids, scaling, and harsh or sticky leachate—AP4 CLASSIC Ultra consistently outperforms standard pumps with significantly longer runtime between service events.

The result:
More uptime. Less labor. Greater confidence in the field.

Because every AP4 CLASSIC Ultra is engineered and assembled in Dexter, Michigan, you get consistent build quality and a pump you can trust in must-run systems.

 

What reliability actually feels like

• Fewer “drop everything” calls
• Less time troubleshooting pumps
• More predictable operations
• Confidence your system is running—even when you’re not there

 

 

Why AP4 CLASSIC Ultra

 

Proven

Field‑tested in the toughest applications—from heavy solids to scaling and harsh leachate.

Simple

Designed so most events are fast, routine cleaning—not time‑consuming repair cycles. Plus, CLASSIC Ultra is stocked for faster, more predictable lead times—so you can plan with confidence and keep site work moving.

Reliable

Longer runtimes mean fewer service events, less downtime, and more predictable operation.

 

Built to Be Cleaned — Not Constantly Rebuilt

A new standard: Cleaning ≠ Maintenance

For decades, the industry has treated all pump service as “maintenance.”
AP4 CLASSIC Ultra changes that.

It’s engineered to run long with routine cleaning, while rebuilds are infrequent and only performed when truly necessary.

 

Routine Cleaning (Regular, Recommended)

• Removes buildup and keeps the pump running as intended
• Typically takes ~30 minutes
• Performed by site technicians or operators

 

Maintenance / Service / Rebuild (Occasional, Not Routine)

• Addresses true wear, damage, or end‑of‑life components
• Typically takes 1–1.5 hours or more
• Performed by trained technicians or service centers

 

Why this matters

Treating every event like a rebuild creates unnecessary downtime, increases labor, and can shorten pump life.

AP4 CLASSIC Ultra is built for fast, routine cleaning—not constant teardown.

✅ Recommended: Basic Cleaning Kit

 

What Makes the CLASSIC Ultra Different

 

Extended Runtime

Proprietary non-stick surfaces reduce solids buildup—extending time between cleanings.

 

Faster, Easier Cleaning

Most service requires only a water spray and light wipe—cutting cleaning time significantly.

 

Simplified Design

No fasteners or cotter pins. 20 fewer parts than standard competitor pumps.
Fewer parts mean faster service and fewer failure points.

 

Targeted Durability Upgrade

A welded lever pin enhances reliability compared to traditional press-fit designs.

 

Ideal Applications

 

AP4 CLASSIC Ultra is ideal for:

• Landfill leachate systems
• Groundwater remediation wells
• High solids and scaling environments
• Harsh industrial fluids and process water

Pump fittings sold separately.

 

Part of the AP4 CLASSIC Series

 

AP4 CLASSIC Ultra is part of a complete pump lineup built for harsh environments and simplified ownership.

Choosing the right pump

• Standard harsh conditions → AP4 CLASSIC Ultra
• High temperature → AP4 CLASSIC HI‑TEMP
• Extreme solids/fouling → AP4 CLASSIC XTREME
• Controlled flow → AP4 CLASSIC LTD

 

Field‑Proven Performance

“Removed residue with some clean water and a swipe of the hand.”
— Field Technician, Texas

“It’s been running for four months and I haven’t had to clean it yet.”
— Field Technician, Michigan

 

Specifications (Summary)

• Diameter: 3.6 in (9.1 cm)
• Maximum depth: 250 ft (76 m)
• Air pressure range: 5–120 psi
• Maximum flow: up to 14 gpm (depending on model)

Common Models:
303211C, 303211CX, 303243C, 303223C, 303244C

👉 Download the full technical data sheet for complete specifications

 

FAQs

 

Are parts backwards compatible with other QED AutoPumps?

Yes. The CLASSIC Series was designed with compatibility in mind. For specific part compatibility, contact QED or refer to the technical data sheet.

 

Does QED offer training on the new CLASSIC pumps?

Yes. QED offers product support and training resources for AP4 CLASSIC pumps. Contact a QED representative to discuss training options for your team or site.

 

Is Ultra built for harsh conditions?

Yes. The CLASSIC Ultra is designed for high solids, scaling, and harsh leachate environments and handles ~90% of site needs. The rest of the CLASSIC Series line up is built to cover your remaining extreme conditions: HI‑TEMP, XTREME, and LTD models are available within the AP4 CLASSIC Series.

 

What does “built to be cleaned” mean?
It means most routine service events are intended to involve fast cleaning rather than full mechanical teardown. AP4 CLASSIC Ultra is designed to reduce buildup and simplify cleaning so teams can return the pump to service quickly.

 

How long does cleaning vs. rebuild take?

Routine cleaning typically takes about 30 minutes. Maintenance, service, or rebuild work may take 1–1.5 hours or more depending on pump condition and site requirements.  

 

Get more uptime with less wrench time

• Request a Quote
• Talk to an Expert
• Download the Data Sheet

 

Engineered & Assembled — Dexter, MI USA

• Quality control you can rely on — built to rigorous manufacturing standards

• Traceability & consistency — designed and assembled under one accountable process

• Reliability in must-run systems — fewer surprises, more confidence in the field

 

• Proprietary non-stick finishes on float and discharge tube to reduce solids buildup
• 100% air-powered operation
• Corrosion-resistant 316-grade stainless steel metallic parts
• Reliable air control mechanism
• Temperature ratings up to 180 °F, making it ideal for high temperature applications.
• ATEX Certified
• Functions under positive or negative (vacuum) pressure environments.
• Does not require clean dry air to function properly and pumps particles up to 1/8 inch in diameter.
• The AP4+ air valves can pass 90 weight oil without fouling.
• Able to pump products with a specific gravity as low as .72
• 5 Year Warranty

• Increase landfill gas extraction rates.
• Reduced risk of liquid leakage through liners and side slope failures.
• Lower rates of odors and non-methane organic compounds.
• Field tests have shown that the AutoPump® AP4 & AP4.5 Ultra will last up to 10 times longer between service events. Tested in the most severe applications.
• Cleans in up to 50% less time than control group, determined by field tests
• Simple disassembly with no fasteners and no cotter pins
• AutoPumps require no surface timer-based controllers, bubblers or sensors in the well to operate.