Looking for Polypropylene 1/4-inch air-operated diaphragm pumps from All-Flo™? This combination pairs a Polypropylene wetted path with a 1/4-inch connection size, two of the biggest factors when you’re choosing an AODD pump. If you prefer a non-metallic wetted path, Polypropylene is a versatile option to consider for compatibility-driven specs. A quarter-inch port size is a nice fit when you want controlled transfer and easy integration into smaller lines and fittings. If you’re replacing an existing unit, double-check your connection size and specs so the swap is smooth. Compare the available models below to find the best fit for your application.