Question about Pool & Spa
Water linked from my century centurion pool pump
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Posted on Jan 02, 2017
NOT THE MOTOR ,THE SEAL... JET PUMPS ARE NOT FOR POOLS.. LOW FLOW HIGH PRESSURE.. YOU NEED HIGH FLOW LOW PRESSURE ... IF NOT YOU MAY HAVE A SUCTION LEAK OR A BAD SHAFT SEAL... VOTE JAY
Posted on Aug 23, 2010
Under the rear cover or under a small cap on the end opposite the shaft will be the shaft end and it should have a slot or key hole. Use a screwdriver or allen wrench to secure the shaft and then turn off the impeller.
Posted on Oct 11, 2010
To get to the Impeller you need to remove a series of bolts, or a large clamp, that holds the two halves of the pump together. Once you do that, if their is a diffuser (housing that goes over the impeller), remove it. To remove the impeller, you need to lock the motor shaft. You can do this a couple different ways depending on the motor. There will either be a small cap that grants access to the motor shaft on the back of the motor, or you remove a larger housing that grants access to the wiring and other components in the back of the motor. If it's the small cap, then you can hold the shaft with a wrench. If it's the larger housing, then you can slip a wrench (probably 7/16") under the thermal overload switch and onto the shaft to lock it in place. Now you can unscrew the impeller. Check to see if the impeller has a screw in the center. If so remove this first. It will be reverse thread. The impeller should spin off counter clockwise. If the impeller is very tight, be careful not to damage it. If you don't have an impeller wrench, I strap wrench, or very large locking pliers with a rag around the impeller works well. Hope this helps. If you need further assistance post a reply in the comments, and don't hesitate to leave a good thumb rating if you found this helpful. Thanks, and good Luck!
Posted on Oct 12, 2010
SOURCE: Our centurion pool pump motor Model B128 replaced less than 1 year ago. Pool company has to replace the impeller twice. Is this common? I believe the pool co sold and installed a used pump instead
Broken impellers generally are not caused by the pump's motor. Impellers usually fail due to back pressure from the filter when the pump shuts off. Air in the filter is compressed while the motor runs, on your pump 12-15 psi. or a bit higher.
When the motor shuts off that compressed air forces water back to the pump, sometimes with enough force to loosen (or completely throw off) the impeller. If the impeller is loose when the pump starts up again it will instantly re-thread the impeller and strip out the threads.
Check to see if you have a suction leak. After the pump has turned on, bleed the air out from the air relief valve on top of the filter. After the pump has run for a while open the air relief valve and see if air comes out. There should be no air, or just a little.
I have seen this back pressure strong enough to blow the skimmer basket up onto the deck.
What make and model of pump and filter do you have?
Posted on Feb 25, 2013
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