125-4093, 18-1145, 20886, 252-338, 45008, 5-533, 51-1577, 540018H, 945008, 99164, AW1093, DP1489, EWP-533, FP1593, P-649, PWP-533, US1093, WH3025, WP-533. Every Gates high-quality new water pump is constructed with premium alloy materials and a 100 percent functional test of seals and bearings along with a 100 percent leakage test for both the casting and assembled water pump.