Jacuzzi ULSB/ULSC Lockbar Knob (39-0052-10-R)

Type:	Pump Parts
Mfr	Carvin/Jacuzzi
Mfg Part #	39-0052-10-R
Hzn Part #	35-105-1800

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TAGS: carvinjacuzzi, poolparts, pumpparts

Details

(DISCONTINUED BY MANUFACTURER)

SEE REPLACEMENT PART: OBSOLETE

A lockbar knob helps make securing and releasing the lockbar more manageable during routine service, and this Jacuzzi Lockbar Knob is designed for compatible ULSB and ULSC applications where the original knob has cracked, stripped, or become unreliable. When a hand-operated part begins to fail, the whole service experience can feel more frustrating than it should.

The ULSB and ULSC compatibility give this knob practical value because service-related fastening parts work best when they match the original engagement and grip relationship closely. A properly selected replacement helps restore smoother handling and more dependable operation in the lockbar area.

This part is especially useful when the lockbar itself remains serviceable and the weakness is isolated to the hand-control portion. That keeps the repair simple while improving usability.

Installed in the proper setup, this knob helps restore easier lockbar operation and contributes to a more service-friendly pump repair overall.

Lockbar knob for compatible Jacuzzi ULSB and ULSC pump applications
Helps restore dependable hand-operated lockbar control
Useful when original knobs are cracked or stripped
Supports easier service and reassembly
Improves usability and repair confidence

Carvin / Jacuzzi – Spa Pumps, Filters, Jets and Pool & Spa Equipment

Who is Carvin / Jacuzzi?

Carvin, associated with the globally recognized Jacuzzi brand, is a leading manufacturer of pool and spa equipment known for innovation in hydrotherapy and water management. With decades of experience, Jacuzzi has become one of the most recognized names in the industry, while Carvin has built a strong reputation for producing high-performance components used in pools, spas, and hot tubs worldwide. Together, they represent a legacy of quality, reliability, and advanced engineering.

What products does Carvin / Jacuzzi specialize in?

Carvin / Jacuzzi specializes in pumps, filtration systems, spa jets, heaters, and water circulation components. Their product lineup includes high-performance pool and spa pumps, cartridge and sand filters, jet systems, and replacement parts designed to support efficient water flow and hydrotherapy performance. These components are commonly used in both new installations and replacement applications.

Why choose Carvin / jacuzzi parts for your pool or spa?

Carvin / Jacuzzi products are known for durability, performance, and trusted brand recognition. Their equipment is engineered to deliver consistent water circulation, effective filtration, and reliable hydrotherapy. Pool professionals and homeowners choose Carvin / Jacuzzi for dependable components that enhance system efficiency, extend equipment life, and maintain a premium spa experience.

How do you identify and choose the correct Carvin / Jacuzzi part?

To select the correct Carvin / Jacuzzi part, it’s important to match your system specifications, including pump model, filter type, jet configuration, and connection sizes. Checking part numbers and equipment labels ensures compatibility and proper performance. Choosing the right component helps maintain efficient operation and prevents system issues.

Need help finding the right Carvin / Jacuzzi part?

At Bath & Spa Parts Online, we carry a wide selection of Carvin / Jacuzzi pool, spa, and bath parts ready to ship. Can’t find what you need? Contact our Product Specialists at 800-918-9143, use the live chat, or visit our Contact Us page. For installation guides, part diagrams, and troubleshooting resources, visit the Bath & Spa Parts Online Knowledge Base for expert support.