
Product Category
4in Movement
Browse our full range of 4in movement — engineered for demanding industrial piping applications.
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4in Movement(5)
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4in Movement
Seismic V-Loop - Weld End - 4" Movement
SKU: FPL-VL-WLD-4M
4″ weld end seismic V-loop for thermal expansion and vibration isolation. Available in 2″-12″ pipe sizes. ASME B31.1 compliant, Buy American Act certified. Protects equipment while accommodating lateral movement in critical piping systems.

4in Movement
Seismic V-Loop - Grooved - 4" Movement
SKU: FPL-VL-GRV-4M
Factory-welded seismic V-loop with 4″ axial movement and grooved ends. 321SS corrugated hose, NSF 372 certified, Buy American Act compliant. Available in 2″-12″ NPS for thermal expansion and seismic applications.

150# Flanged V-Loops
Seismic V-Loop - 150# Flanged - 4" Movement
SKU: FPL-VL-FLG-4M
Seismic V-Loop 150# flanged expansion joint with 4″ axial movement. 321SS/304SS construction, NSF 372 certified, Buy American Act compliant. Factory-welded for reliability in thermal expansion and vibration isolation applications.

4in Movement
Seismic V-Loop - Threaded NPT - 4" Movement
SKU: FPL-VL-THD-4M
Premium seismic V-loop threaded NPT hose with 4″ movement capacity. 321SS corrugated construction, NSF 372 certified, Buy American Act compliant. Factory-welded for vibration isolation and thermal expansion in industrial piping systems.

4in Movement
Seismic V-Loop - Copper Sweat - 4" Movement
SKU: FPL-VL-SWT-4M
Seismic V-Loop copper sweat connections with 4″ axial movement. Factory-welded 321SS corrugated hose and 304SS braid. NSF 372 certified, Buy American Act compliant. 9 sizes available for HVAC and industrial piping.
Need a custom configuration?
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