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The TUTHILL CORP FRTC is a vented fill tank cap designed to fit 2-inch male threaded tank openings. The vent allows pressure equalization during fluid draw and fill cycles, preventing vacuum lock or pressure buildup inside the tank. This type of cap is a standard component in fuel oil, chemical, and fluid transfer storage systems and is typically serviced by plumbing and mechanical contractors as part of routine tank maintenance or system installation.
The FRTC is suited for use on tanks requiring a 2-inch male threaded fill opening. Common applications include residential and light commercial fuel oil storage tanks, hydraulic fluid reservoirs, and bulk liquid storage containers where a vented cap is required to maintain proper tank pressure balance during operation and servicing.
Designed for use with all 2-inch male threaded tank openings, making it broadly compatible with standard fuel oil and fluid storage tank fill ports of that thread size.
Installation is performed by licensed plumbing or mechanical contractors following applicable local and national codes. Before replacing a tank cap, shut off any connected supply lines and relieve any residual tank pressure per safe service procedures. Hand-tighten the cap fully onto the male threads, then confirm a snug, leak-free fit before returning the system to service. Do not over-torque threaded plastic or soft-metal caps, as this can damage the tank opening threads.
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