Def adapter

Designed to fit into DEF tank openings—from cars and trucks to Tractors and heavy machinery—this adapter threads directly on your Tuff Jug Auto-Stop Spout for a clean, easy pour, every time.

Leak-Proof Design – Built with Viton o-rings to provide a leak free seal.

Versatile Fit – Works with tank openings at least 0.7". Works in conjunction with the Auto-Stop Spout on all 3 Tuff Jug utility container sizes.

Tuff Jug Quality – Heavy-duty construction built to last

Why It Matters:
DEF tank inlets are too small for the standard Auto-Stop Spout diameter. The DEF adapter solves the problem. No more funnels. No more spills. Just smooth fills and more control.

Will the flow rate be slower when using the DEF Adapter?:

When using the DEF Adapter, you will notice a slower flow rate compared to using the standard Tuff Jug Auto Stop spout by itself. This is due to two factors:

• The DEF Adapter has a smaller internal diameter than the standard auto-stop spout, thus flow is restricted.

• A vent line cannot be run all the way to the tip of the adapter, which limits airflow and slows dispensing.