For compact residential and light commercial hydronic applications requiring reliable performance in limited spaces, the Bell & Gossett 1BL068LF PL-55B circulator delivers efficient operation and durable service. This versatile 1/6 HP pump features a space-saving design that makes it ideal for boiler systems, zoning applications, and hydronic heating circuits where physical space is at a premium. Its efficient wet-rotor technology provides quiet, maintenance-free operation while ensuring years of dependable service.
The pump utilizes Bell & Gossett’s proven hydraulic engineering in a compact package, featuring cast iron construction with a bronze impeller for long-term durability in closed-loop systems. The wet-rotor design eliminates the need for coupling alignment and separate motor lubrication, while the compact inline configuration allows for easy installation between pipe unions in tight mechanical spaces. With single-speed operation optimized for typical residential applications, the PL-55B provides consistent, reliable circulation without complex adjustments or controls. For system design guidance, read our blog on [Selecting Circulators for Residential Hydronic Systems].
As part of Bell & Gossett’s comprehensive PL series, this circulator offers the quality and reliability that professionals expect from the brand, now in a compact format perfect for modern installations. Whether serving as a primary circulator in a small home system or as a zoning pump in a multi-circuit application, the 1BL068LF delivers the performance needed to maintain optimal comfort and system efficiency. Learn about its role in modern hydronics in our article [The Importance of Proper Circulator Sizing in Residential HVAC Systems].
Technical Specifications
| Specification | Details |
|---|---|
| Model | Bell & Gossett PL-55B (1BL068LF) |
| Motor Power | 1/6 HP (0.12 kW) |
| Connection Size | 1″ FIPT x 1″ FIPT |
| Impeller Material | Bronze |
| Housing Material | Cast Iron |
| Max Head | 8 ft (2.4 m) |
| Max Flow | 25 US gpm (95 L/min) |
| Speed Settings | Single Speed |
| Max Operating Pressure | 125 psi (8.6 bar) |
| Max Fluid Temperature | 230°F (110°C) |
| Voltage | 115V, 1-Phase |
| Weight | 8 lbs (3.6 kg) |
Comparison Table: B&G PL-55B vs. Alternative Small Circulators
| Feature | B&G PL-55B (1/6 HP) | Competitor A (1/12 HP) | Competitor B (1/4 HP) |
|---|---|---|---|
| Power Range | Ideal for Most Homes | Underpowered for Many Applications | Overpowered for Basic Systems |
| Physical Size | Compact | Very Compact | Larger |
| Flow Capacity | Adequate for Typical Residential | Limited | More Than Typically Needed |
| Energy Consumption | Efficient | Very Efficient | Higher Consumption |
| Application Range | Versatile for Residential | Limited to Small Systems | Better for Light Commercial |
| Value Proposition | Excellent Balance | Budget Option | Premium Option |
Frequently Asked Questions (FAQs)
Q1: What type of heating systems is the PL-55B best suited for?
This circulator is ideal for residential hydronic heating systems including small to medium-sized boiler systems, radiant floor heating zones, baseboard heater circuits, and snow melt systems for driveways and walkways. Its 1/6 HP rating provides ample power for most single-family home applications.
Q2: Can this pump be used for domestic hot water recirculation?
No, the PL-55B is designed for closed-loop heating systems only. The cast iron construction is not suitable for potable water applications. For domestic hot water recirculation, consider the [Bell & Gossett Bronze Circulator Series] which is specifically designed for potable water systems.
Q3: What is the advantage of the wet-rotor design?
The wet-rotor design means the pump operates quietly and requires no maintenance – no lubrication, no mechanical seals to replace. The system fluid lubricates and cools the motor bearings, ensuring long, trouble-free service life with minimal noise generation.
Q4: Is this pump suitable for both heating and chilled water applications?
Yes, the PL-55B is designed for closed-loop hydronic systems and works effectively in both heating and cooling applications within its published temperature and pressure ratings. It performs well in heating systems up to 230°F and can be used in chilled water applications for air conditioning.
Q5: How does this compact circulator compare to larger residential models?
The PL-55B offers the perfect balance of size and performance for typical residential applications. While larger circulators (1/4 HP or 1/3 HP) may be overkill for many homes, and smaller models (1/12 HP) may lack sufficient power, the 1/6 HP rating hits the sweet spot for most residential heating systems.
Pros and Cons
| Pros | Cons |
|---|---|
| Compact Size for easy installation in tight spaces | Single-Speed Operation limits performance tuning |
| Maintenance-Free Operation with wet-rotor design | Not for Potable Water applications |
| Quiet Performance ideal for residential settings | Limited to Residential/Small Commercial use |
| Energy Efficient design reduces operating costs | Lower Flow/Head than larger circulators |
| Proven Reliability from Bell & Gossett engineering | Cast Iron Construction requires closed-loop systems |
| Cost-Effective for typical residential applications |
Conclusion & Ideal Use Cases
The Bell & Gossett 1BL068LF PL-55B circulator represents an excellent value proposition for residential and light commercial hydronic systems where space, reliability, and cost-effectiveness are primary considerations. Its compact design and appropriate power rating make it ideally suited for the majority of residential heating applications without the expense of oversized equipment.
This circulator is perfectly suited for:
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Residential Hydronic Heating: Boiler-based systems in single-family homes
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Radiant Floor Heating: Individual zone circulation for room-specific control
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Snow Melt Systems: Small to medium driveway and walkway applications
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Zoning Applications: Secondary circulator for multi-zone systems
For larger residential applications or small commercial buildings, consider the [Bell & Gossett PL-77 1/3 HP Circulator]. However, for typical single-family homes and light-duty applications, the PL-55B provides the ideal combination of performance, reliability, and value that homeowners and contractors appreciate.
Contact our HVAC specialists today for assistance in selecting the right circulator for your heating system and to learn about our competitive pricing on this compact, reliable performer.
