Description
Taco 1911E1E1 1/2HP Cast Iron Circulator Pump | Ultimate Product Guide
The Taco 1911E1E1 is a robust and reliable close-coupled, in-line centrifugal pump from the trusted Taco 1900 Series. Built for demanding applications, this Taco 1911E1E1 model is engineered to move high volumes of water in commercial and industrial hydronic systems, including heating, cooling, and process water loops. Its heavy-duty cast iron construction and powerful 1/2 HP, 1760 RPM motor are designed for continuous duty and long service life.
Featuring versatile 1-1/2″ flanged connections for a secure, leak-free fit and a multi-voltage motor (115/208-230V), this pump offers flexibility for a wide range of installation scenarios. It embodies Taco’s legacy of quality, providing a workhorse solution for system designers and contractors who prioritize durability and proven performance.
Detailed Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | 1911E1E1 |
| Series | 1900 Series |
| Pump Type | Close-Coupled, In-Line Centrifugal |
| Horsepower (HP) | 1/2 HP |
| Motor Type | ODP (Open Drip Proof) |
| Phase | Single Phase |
| Speed (RPM) | 1760 RPM |
| Voltage | 115V / 208-230V (Multi-Tap) |
| Frequency | 60 Hz |
| Connection Type | Flanged |
| Connection Size | 1-1/2″ |
| Construction | Cast Iron |
| Seal Type | Mechanical Seal |
Performance Range (Typical for 1900 Series)
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Flow Range: Up to 250 GPM
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Head Capabilities: Up to 160 ft.
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Max. Pressure: 125 PSI
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Max. Temperature: 230° F (110° C)
Taco 1911E1E1 vs. Other Pump Types: Comparison Table
Understanding where this industrial-grade pump fits in the market is key.
| Feature | Taco 1911E1E1 (Cast Iron) | Residential ECM Pump (e.g., Taco 00e) | Bronze Booster Pump |
|---|---|---|---|
| Primary Use | Commercial/Industrial Hydronics | Residential Hydronics & DHW | Domestic Water Pressure Boosting |
| Construction | Heavy-Duty Cast Iron | Bronze/Composite | Bronze |
| Motor | 1/2 HP ODP (Powerful) | Small ECM (Efficient) | Small PSC |
| Efficiency | Standard Efficiency | Very High Efficiency | Standard Efficiency |
| Durability | Excellent for harsh systems | Excellent for clean systems | Good for clean water |
| Potable Water Safe | No (Can rust water) | Yes | Yes |
| Noise Level | Moderate | Whisper Quiet | Moderate |
| Initial Cost | Moderate | High | Low-Moderate |
Frequently Asked Questions (FAQ)
Q1: Is this pump suitable for drinking water?
A: No. The cast iron construction is not corrosion-resistant like bronze or stainless steel. Using it with potable (drinking) water will cause rust and discoloration. This pump is designed exclusively for closed-loop hydronic heating and cooling systems.
Q2: What does “close-coupled” mean?
A: It means the pump head and motor are assembled together as a single unit onto a common shaft. This design is compact, mechanically simple, and easier to align compared to frame-mounted pumps.
Q3: What is an ODP motor?
A: ODP stands for Open Drip Proof. It means the motor is designed so that liquid dripping from above at a 15-degree angle cannot enter the motor interior. It is a common and reliable motor type for indoor industrial applications but is not waterproof or dust-tight.
Q4: How do I wire the motor for different voltages?
A: The motor is multi-voltage. The connection diagram on the motor’s nameplate will provide specific instructions for wiring it for either 115V or 208-230V operation. Always ensure the power supply matches the wiring configuration.
Q5: Is this a variable speed pump?
A: No. The Taco 1911E1E1 is a fixed-speed pump operating at a constant 1760 RPM. Its flow rate is adjusted manually by balancing valves within the system, not by changing the pump’s speed.
Q6: What maintenance does it require?
A: These pumps are designed for minimal maintenance. The primary service item is the mechanical seal, which may eventually need replacement if it begins to leak. Ensuring the system is clean and free of abrasives will maximize the seal and bearing life.
Pros and Cons
Pros:
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Industrial Strength: Built with heavy-duty cast iron for maximum durability in demanding environments.
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High Performance: Capable of moving high gallons-per-minute (GPM) against significant head pressure.
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Proven Reliability: A simple, time-tested design from a legendary brand (Taco) with a long history of performance.
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Installation Flexibility: Flanged connections provide a strong, reliable seal and are standard in commercial piping.
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Voltage Versatility: A multi-voltage motor allows installation in various electrical settings without needing a separate transformer.
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Cost-Effective: Provides commercial-grade performance at a reasonable initial cost for its class.
Cons:
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Not for Potable Water: Cast iron construction prohibits use with drinking water.
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Lower Efficiency: Lacks the energy-saving benefits of modern ECM motor technology, leading to higher operating costs over time.
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Heavier Weight: Cast iron construction makes it significantly heavier than composite or bronze pumps.
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Fixed Speed: Cannot automatically adjust its speed to match changing system demands, which is less efficient.
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Louder Operation: Typically louder than newer, high-efficiency circulators.
Conclusion & Best Applications
The Taco 1911E1E1 is a classic workhorse designed for rugged performance and longevity. It is the go-to choice for commercial and industrial applications where brute strength and reliability are more critical than energy efficiency or quiet operation.
You should choose this pump if:
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You need a pump for a commercial building’s hot water heating or chilled water cooling system.
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You are replacing an old, cast iron circulator in an industrial setting.
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Durability and upfront cost are higher priorities than energy savings.
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The application involves a closed-loop system with non-potable water.
For engineers and contractors who value proven performance and robust construction for heavy-duty hydronic applications, the Taco 1900 Series remains a trusted and effective solution.
Disclaimer: This pump is designed for closed-loop hydronic systems only. Installation must be performed by a qualified professional to ensure proper wiring, piping, and system operation. Always confirm the motor is wired for the correct supply voltage.
