ST-340 Brass Live Swivel – 1/2" MPT x 1/2" FPT Pressure Washer Swivel

Part Number: 6645
Category: Pressure Washer Parts → Swivels & Fittings
Type: ST-340 Brass Live Swivel – 1/2" MPT x 1/2" FPT Pressure Washer Swivel, 3200 PSI

The ST-340 Hi Flow Brass Live Swivel (Part #6645) is a genuine Suttner high-flow pressure washer swivel engineered for professional pressure washing, industrial cleaning, wash bays, hose reels, spray guns, and high-volume fluid transfer applications. Featuring a live swivel design, it provides smooth 360-degree rotation under pressure, helping prevent hose twisting, reduce operator fatigue, and minimize stress on hoses and plumbing connections.

Key Features & Benefits

• Genuine Suttner ST-340 Hi Flow live swivel
• Part Number: 6645
• High-flow live swivel design
• 1/2" Female NPT inlet
• 1/2" Male NPT outlet
• Smooth 360° swivel rotation under pressure
• Durable brass construction
• Rated for systems up to 3,200 PSI
• Supports flow rates up to 42 GPM
• Maximum operating temperature: 212°F
• Helps prevent hose twisting and kinking
• Reduces stress on hoses and plumbing components
• Ideal for high-flow commercial and industrial applications

Technical Specifications

Part Number: 6645

Manufacturer: Suttner

Manufacturer Model: ST-340 Hi Flow

Product Type: Live Pressure Washer Swivel

Inlet Connection: 1/2" Female NPT

Outlet Connection: 1/2" Male NPT

Maximum Working Pressure: 3,200 PSI

Maximum Flow Rate: 42 GPM

Maximum Temperature: 212°F

Material: Brass

Swivel Rotation: 360°

OEM Replacement: Yes

Compatible Applications

Suitable for use with:

• Commercial pressure washers
• Industrial pressure washing systems
• Hot and cold water pressure washers
• Pressure washer hose reels
• Pressure washer spray guns
• High-flow hose assemblies
• Wash bay equipment
• Fleet washing systems
• Agricultural cleaning equipment
• Industrial fluid transfer systems
• Manufacturing facilities

Always verify thread size, pressure rating, flow requirements, temperature rating, and equipment compatibility before ordering.

Function of the Live Swivel

The Suttner ST-340 Hi Flow Live Swivel helps:

• Provide smooth 360° rotation under pressure
• Prevent hose twisting and kinking
• Reduce stress on hoses and plumbing components
• Maintain unrestricted high-volume water flow
• Improve operator comfort and maneuverability
• Extend the service life of hoses, spray guns, and connected equipment

Its high-flow live swivel design is ideal for applications requiring exceptional water flow while maintaining unrestricted swivel movement.

Common Signs Replacement Is Needed

Replace the swivel if you notice:

• Water leaking around the swivel body
• Restricted or rough swivel rotation
• Excessive hose twisting
• Damaged or worn threads
• Corrosion or physical damage
• Reduced swivel performance under pressure

Replacing a worn swivel restores smooth hose movement and dependable high-flow performance.

Installation & Service Notes

Turn off the pressure washer and relieve all system pressure before installation.

Apply an appropriate thread sealant where required and install the swivel using the 1/2" Female NPT inlet and 1/2" Male NPT outlet connections.

Tighten all fittings securely without overtightening.

Verify the swivel rotates freely and inspect all connections for leaks before placing the system into service.

Important: Never exceed the maximum 3,200 PSI working pressure, 42 GPM flow rate, or 212°F operating temperature. Always verify compatibility with your pressure washer system and plumbing components before installation.

Maintenance Recommendations

• Inspect the swivel regularly for leaks and smooth rotation.
• Check threaded connections during routine maintenance.
• Keep the swivel clean and free of dirt, debris, and mineral buildup.
• Replace worn seals or damaged components promptly.
• Inspect hoses for twisting or abnormal wear during operation.
• Use only genuine Suttner replacement parts to maintain proper fit, reliable performance, and long-term service life.