Choosing Wilden® Iron 4-inch AODD pumps comes down to fit, compatibility, and operating conditions. If your system moves more product, the 4-inch format can help with heavier transfer duty and larger piping runs. If durability is the priority and weight is less of a concern, iron can be a great fit for tougher-duty use. This combination pairs a Iron wetted path with a 4-inch connection size, two of the biggest factors when you’re choosing an AODD pump. For the best long-term fit, compare construction options, diaphragm materials, and system requirements before you select a pump. Compare the available models below to find the best fit for your application.