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Re: How to compare pumps
Contrary to the advice given when selecting a filter, a bigger pump is not always a good thing. Unless you have been advised by a pool professional, or someone in the know that your existing pump was undersized, it would be wise to keep the same horsepower as you have now.
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THATS A BIG PUMP ! ARE YOU SURE IT'S THE RIGHT SIZE .. CALL YOUR LOCAL POOL PUMP MOTOR REPAIR GUY(DO A GOOGLE SEARCH) AND TELL HIM THE SIZE (GALLONS) OF YOUR POOL AND IF YOU HAVE SOLAR , HOT TUB . GETTING IT RIGHT WILL SAVE YOU ELECTRICITY $$$ ..GOOD LUCK AN VOTE IF I WAS OF HELP.. YOU KNOW I DO THIS 4 FREE RIGHT ?
This is a lot of pump for a fish pond. You should use the safe-guards as you would find in a pool, two drain's separated by 3 or so feet and/or a couple skimmers. You dont want the fish getting pulled into the drains/skimmers. It will also be a lot of $ to run the pump compared to a smaller 'fish pond' pump ... of course your pond may be much larger than the average garden variety.
Personally, I dont think this is a good idea for a small pond. Tell me more about your pond.
First I find it interesting you know the pump is using twice as much electricity. Did you measure the current with an amp meter? or are you looking at your bill. If you're reading an amp meter, then how does it compare to the Full load amps on the name plate. If it less than or equal to the full load ,then there is no problem with the pump. The motor will be hot on a hot day and running 24/7. A pump will draw more current when it does more work(pumping more water) Is it possible you have either cleaned the filter, allowing the pump to pump more water? Have you changed the discharge jets to a larger size? While any of these would drop pressure, it will increase the load on the pump. Have you selected a combination of suction from skimmer & main drain, where you previously only used one? Just a few ideas. Good Luck!
The impeller and/or motor shaft is stuck or seized. If accessible you can try rotating the motor shaft with a visegrip plier or similar tool to see if it will come lose. Otherwise you should consider having the pump taken out and overhauled. Often the shaft seal begins leaking and result in water damage to the motor bearings. Bearings can be replaced, but compare labor and parts for overhaul to simply replacing the whole pump.
Either the start capacitor, start switch or winding, or perhaps some combination of the three is failing. You can take it to a local electric motor repair shop and see if it can be repaired or get a cost to replace just the motor and probably the pump seal. You would still save money compared to the cost of a whole new pump.