The most frequent pump leaks are from the shaft seal assembly. The pump shaft seal is located where the motor shaft goes into the pump. Shaft seals will wear over time and generally need to be replaced every 2-3 years. Improper water chemistry or extended run times will cause shaft seals to wear out more quickly. What are the signs of a shaft seal leak? A shaft seal leak is usually noticed as water on the ground under the pump. On many pumps the motor shaft is visible and leaks will be vi