JW Controlling, Venting, Sealing of Liquids and Gases

JW Industrial Flow Control & Sealing Solutions | Freer Tool

Freer Tool & Supply distributes professional JW Winco fluid control and sealing solutions designed for hydraulic systems, industrial equipment, and manufacturing applications. Our comprehensive range includes German-engineered oil sight glasses, fluid level indicators, dome shaped sight glasses, and fill/drain plugs that provide reliable fluid monitoring and system protection.

JW Winco components for controlling, venting, and sealing liquids and gases are machine elements used to seal ports, equalize pressure, and manage venting on tanks, gearboxes, reservoirs, manifolds, and industrial enclosures (application dependent). These parts are commonly used to help prevent leaks, reduce pressure buildup, and support safer, cleaner operation in fluid-handling and pneumatic/hydraulic-adjacent applications. Because performance depends on the thread, seal style, and material, selecting the right vent or plug is primarily a specification-driven decision.

Special modifications available:

Threads
colors
kitting, packaging, and labeling

Fluid level sight glasses, fluid level indicators, sight glasses, and fill/drain plugs are also referred to as:

liquid level indicators, oil gauges, oil windows, explosion-proof oil windows, gearboxes, threaded plugs, oil dipsticks and dipsticks, hydraulic components