In this manner, the steel supports the aluminum. Now, as the end of the aluminum spout thins out due to abrasion and impact, it can no longer round in because of the support of the bushing. While the bushing can't stop a customer from topping off, it will decrease the unintended results of doing so. The spout is then stuck. Because of this stress, you are creating a potential for a leak area.
Any potential leak is a safety, fire and emissions control issue.
A simple Husky stainless steel bushing would help prevent this rounding in and subsequently eliminate a multitude of problems. The applications of technology discussed above are so simple. But it's the attention to detail that matters if manufacturers are to meet the performance requirements envisioned by the California Air Resources Control Board and auto manufacturers in their quest for achieving stringent emissions controls.