DEF Adapter
Built specifically for DEF inlets, the DEF Adapter lets your Tuff Jug spout fit securely into the smaller inlet openings found on most DEF tanks. No more forcing a standard spout into a tight fill neck or dealing with spills and backsplash — this adapter creates a snug, leak-free connection so you can top off DEF fluid quickly and cleanly.
Use Case: Designed for precise, spill-free DEF fluid transfer into smaller tank openings
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The Tuff Jug difference is that it’s built as a complete system, not just a basic jug. With rugged construction, smarter sealing, versatile cap options, and features designed for faster, cleaner, more controlled liquid handling, Tuff Jug gives you a more dependable setup for real-world filling, storage, and transfer.