How to Replace a Pool Pump Seal

To maintain your swimming pool's spotless appearance and water quality, the pool pump seal must function at top performance. When it wears out, every part of the pool pump is susceptible to damage. Replace the pool pump seal as soon as you identify the problem.

Step 1- How to Recognize a Faulty Pool Pump Seal

There are two ways to know if there is a problem with the pool pump. When the pool begins to "run hot" due to the motor overheating, it will shut itself off from time to time instead of running steadily. The other telltale sign is the formation of bubbles in the pool. This can also indicate wear on the strainer basket or the gasket beneath it.

Step 2- How to Get Access to the Pool Pump Seal

The pool pump seal is inside the pool pump motor. To get at it, disconnect the electricity supply to the pump at the circuit box. Check the owner's manual to find out if the pool must be drained for pump repairs. Open up the pool pump cover and lift the motor and its bracket out of the way of the impeller, a rotating blade assembly. The pool pump seal, made of ceramic, is inside the impeller.

Step 3- Open up the Impeller and Extract the Pool Pump Seal

Release the impeller cover and detach the impeller from the pump housing. Rotate it out of its housing in the opposite direction to which the blades turn. Check the impeller for any signs of wear or damage that could be contributing to the problem. Undo the seal plate, remove it, and extract the pool pump seal assembly with the seal spring and seal gasket. It is made of fragile ceramic, so hold it firmly while taking it out.

Step 4- Insert the New Pool Pump Seal

Wipe the area where the new seal will be inserted with a clean, lint-free cloth. Check the seal spring and gasket for any damage and replace the gasket if it shows wear, rips or wrinkles. Holding the new ceramic seal, spring and gasket assembly gently, slip all of them into the housing. Avoid getting any contaminants on the new pump seal. Reinsert the seal plate and screw it shut tightly, then reattach the impeller. Put both back into the pool pump housing. Return the pool pump motor and its bracket back into the pump housing. Secure the pump housing cover and fasten its screws tightly.

Step 5- Restore Electrical Power and Test the Pool Pump

When you turn on the electricity again, the pool pump should resume operating at it's normal speed and sound. If this does not happen, check other features of the pump. If your pump has a timer, make sure it is working properly. Note the temperature setting of the pump motor thermal switch. If it is set too low, adjust it up a few degrees. If bubbles are still appearing, note the water level in the pool. Add more water if it is below the skimmer inlet.