Wilden Diaphragm Pump. Model: 15. Flow rate for new pump is 232 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this refurbished pump should handle your specific duty. Maximum solid size: 10 mm. Material of construction: Aluminum. Port size: (2) 3 in. NPT. (1) 3/4 in. FNPT. Overall dimensions: 1 ft. 9-3/4 in. L x 1 ft. 5 in. W x 2 ft. 8-1/4 in. H.(ACN19).