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Two separate pumps for pool and spa vs. one VP for both?

Posted by Pool_newbie (My Page) on
Tue, Oct 29, 13 at 17:29

Hi, I'm looking to build a pool in the next few months and I got 2 bidders so far with two different options. Both gave me good reasons so I don't know what option I should go. Please advise.

PB A:
1 HP traditional pump for pool
1.5 HP booster pump for spa (8 jets)
Separate pump for water feature

PB B:
2 HP variable speed pump for both pool and spa (6 jets)
Separate pump for water feature

PB A claims that separate pumps would save you electricity.

PB B, on the other hand, claims the VS pump is energy efficient vs the traditional pumps. It's a waste of $ to put in another pump for spa.

Any suggestions here as which one is right. I'm more confused than ever.

PS. Also, which one would you prefer? Pentair or Hayward? Sales people would tell me that they are the same. But I heard some other pool owners would say Pentair is top of the line and Hayward comes second.

This post was edited by Pool_newbie on Wed, Oct 30, 13 at 10:21


Follow-Up Postings:

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RE: Two separate pumps for pool and spa vs. one VP for both?

pool newbie,
Some of the answer depends on your electric rate. If you go to the Pentair website, they have a pump calculator that will compare cost to run single speed vs. VS pumps.
I like the idea of a VS pump on the pool and spa with a separate fountain feature pump. Pentair makes a great controller to go with their VS pump. I have never been a big Hayward fan.
Most manufacturers offer 3 year warranties.
Good luck.


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RE: Two separate pumps for pool and spa vs. one VP for both?

Thanks for your response. The Pentair website indeed shows that I can save a lot of $$$ with VS than single pump. However, I still don't fully understand how VS (2 speeds pump to be exact) works for both pool and spa. Can just one VS pump handle both spa and pool?

This post was edited by Pool_newbie on Wed, Oct 30, 13 at 10:35


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RE: Two separate pumps for pool and spa vs. one VP for both?

Pool newbie,
A VS pump is not a 2-speed pump!
A VS pump can run from 400 rpm to 3450 rpm. you can dial in the flow you need. Example: you can set the pool at 1500 rpm and then when you use the spa you run the pump at 3450 rpm which should easily run 6-8 or more.
The important factor is to size the plumbing for the max flow of about 160 gpm for the spa.
The controller does the work after the set up. push the pool button and get the lower flow rate. Then hit the spa button and the controller tells the pump to move to 3450 rpm or whatever you have set.


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RE: Two separate pumps for pool and spa vs. one VP for both?

Pool Newbie...the way the VS (variable speed) pump works for both the pool and the spa is that you cannot have both circulating at the same time. When the spa is on, the pool water is not circulating through the returns. No big deal. The spa is usually only on a small percentage of the time.


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