When purchasing, always verify that the unit ships complete with its matching inspection cover and drainage plug components.
Assuming you want a concise overview of the "EZD 311" (interpreting this as a product/model named EZD 311) and what's new about it, here’s a short, structured summary. If you meant something else (a different product, a law/form, or a vehicle), tell me which and I'll adapt. ezd 311 new