When your system calls for 1/4-inch Polypropylene AODD pumps from Wilden®, a few details matter most. The compact 1/4-inch connection size works well for tight installations, lighter transfer duty, and equipment skids where space is limited. Polypropylene is a popular choice when you want a lightweight thermoplastic wetted path for many chemical transfer applications. These Wilden® 1/4-inch air-operated double diaphragm pumps use a Polypropylene wetted path and are built for dependable pneumatic pumping. If you’re replacing an existing unit, double-check your connection size and specs so the swap is smooth. Browse available configurations below and pick the option that matches your setup.