A: There are many factors to consider when choosing a pump, but looking purely by price we have a Waterco Supastream 1-1/2 Swimming Pool Pump for $293.44.
Q: If not looking just at price what brand would you recommend? I currently have a Hayward pump 1 1/2 HP. Also, what would avialability be?
A: There are a lot of factors I use to size a pool pump. I will put a few questions below that can guide us.
How many gallons are in your pool? (around 26,000)
What area of the country do you live in? (AZ Tucson)
Is the pump in a place where noise is a factor? (yes)
Do you get a lot of leaves in the pool? no Do you have a spa? no Which Hayward pump do you have now? (1-1/2 hp Hayward Super II Pump)
...also, have water fountain runs with pump.
A: Here in Tucson we size pumps for 4 hour "turnover" that is where all the water can go through the filter in a four hour period. So for your pool we want in the neighborhood of 108 gallons per minute (26,000 Gallons/4 hours/60 minutes = 108 Gallons Per Minute). This is plenty of pump to run almost any fountain and still provide water to returns.
If you have a Full Rated Super 2 Pump you should be getting just about 120 GPM from your current pump. There is some variance on pump outputs due to plumbing configurations.
Knowing our desired flow we can look at replacement pumps:
The most economical choice would be the Waterco Hydrostorm Swimming Pool Pump.
You get the 1.5 Hp version for $455.60 and get about 130 GPM which is a bit more water than you had before. The trade off is that the Hydrostorm can be a little louder while operating than lower output pumps.
If you want a very high performance pump the Whisperflo Swimming Pool Pump is a great money saver for the long term for your application. The one horsepower Whisperflo pump should be moving about 100 Gallons per minute, this is a small amount under our projected flow but will yield very good power savings in long term because we are dropping a half a horsepower, this will be easily seen on you electric bill. It is also a very quiet pump for $596.60.
You could also drop to to a one horsepower Super II but it costs about the same as a Whisperflo and the Whisper has the advantage of being quieter.
Both the Whisperflo or the Super II I can get to you in 1-2 days, the Hydrostorm I am out of and have to get in from Georgia and it would be about a week.
If you have questions or concerns feel free to let me know.
We could also have a side discussion about the large power advantages of 2 speed or variable speed pumps but the initial outlay is quite a bit more so it takes a while to work it off.