Hello, I have a painted concrete, ~7,000 gallon in-ground pool, in Tampa Bay, FL with a non-functioning waterfall (was leaking, so capped line at pump), and I am looking for advice on sizing a new pump or motor. In the future, I would maybe like to get the waterfall functioning again it is a flagstone, stepped waterfall that has 3-4 outlets at the top where the water flows out of they dont look very large in diameter. The water runs down the flagstone steps until it is deposited into the pool.
Pentair Whisperflo with 220V A.O. Smith B854 1.5 HP, 56Y Frame Uprate Motor Motor & Seal plate Replaced in July 2010
Pentair Clean & Clear Pool Filter At least 150 square feet if not 200 square feet based on filter height (sticker on back of filter, not visible due to proximity to wall).
I replaced the skimmer early this year due to cracked plastic causing large leak with a Hayward SP10712S Skim-Master Series from Amazon.
Tropical 102,000 BTU Pool Heater (hardly ever used, I actually have had the breaker switched off for at least 2 years)
~7,000 gallon pool with 1 main drain, 1 skimmer, 4 return jets
Height of pump is about level with the main drain, 36 to return jets height, and 42 to skimmer plumbing height.
Pump inlet is 2, filter plumbing 2, return jet 1-1/2 plumbing, waterfall return 2-1/2 at pump valve (capped off, not sure of sizing at actual waterfall)
o Pool Heater & Filter are from previous home with a large 20,000+ gallon pool
It all started a week ago because I wanted to replace some loud motor bearings. While disassembling the motor, I realized one of the threaded inserts in the seal plate had come loose (the same thing happened in 2010) and I also snapped one of the long quarter-inch retaining bolts
Now I have 3 options:
1. Replace with new pump + motor combo, appropriately sized this time.
2. Replace seal plate, pump gaskets + new 2 speed motor
3. Replace seal plate, pump gaskets + new 1 speed motor
I was really interested in the Variable Speed motors until I read some posts by mas985 and downloaded his Excel calculator (I got lost in all the numbers though). I realized in Florida, living 40 miles from Tampa, FL, which is the lightning capital of the world, and also with our low energy rates - $0.11/kwH, it didnt make sense to get a variable speed. So now I am really torn between the 3 options listed above.
With option 2, Id want to also change all the pump gaskets (~$20) and the seal plate ($54) when I factor in a new 2 speed motor (Hayward SPX3210Z2BER 1-Horsepower 2 Speed Energy Efficient Full Rate Motor Replacement for Hayward Tristar SP3200EE Series Pump - $280.99 Amazon.com), it is only $90 more for a Pentair 340042 SuperFlo High Performance Energy Efficient Two Speed Pump, 1 Horsepower, 230 Volt, 1 Phase - $447 off Amazon.
With option 3, it is a little less expensive, but I dont know if Id end up paying more than the difference with option 2 in increased energy usage.
I look forward to hearing your opinions,