Pool Pump Impeller Size Query

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H

Hocuspocusblade

Member
Dec 7, 2024
7
Arizona
First time poster here!
I have a Hayward Super II Pump SPX3020AA fitted with a Hayward SPX3016C impeller, but only running it with a 1 SFHP motor.
Would that explain why the strainer never fills completely?
If that is the case would downsizing the impeller make it run more efficiently?
Thanks for your anticipated replies!
 
SPX3016C requires 2 hp.

The motor is way overloaded.

For your motor, you need a SPX3005C or a SPX3007C.

Impeller.....Total HP required.

SPX3005C......0.75
SPX3007C......1.10
SPX3010C......1.5
SPX3016C......2.0
SPX3021C......2.5
SPX306C......3.45


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JamesW said:
HAYWARD 2" x 2" Super II Pump Housing Strainer with Drain Plugs SPX3020AA.

That is the housing part number, not the pump Model Number.

Most likely, the housing has been replaced.
Click to expand...
Thanks for your replies, you are clearly a hive of information!
I replaced the housing a few years ago now, yes and swapped out some of the parts.
As such, I don't have a specific pump model number if it is as I assume you are referring to a complete Hayward unit.
If I downsize the impeller as per your recommendation would I need to change out other parts too?
 
Hocuspocusblade said:
If I downsize the impeller as per your recommendation would I need to change out other parts too?
Click to expand...
The diffuser needs to be changed to a SPX300BN and the Impeller Ring needs to be changed to a SPX3005R.

For Impeller SPX3005C, SP3007C, SP3010C, USE SPX3005R; For Impeller SPX3016C or above, use SPX3021R.

You should also replace the seal.

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I'm not exactly sure I'm reading the pool pump motor label correctly as a 1 SFHP as it is infact uprated to 1.5HP.
The motor is a:

Century (A.O. Smith) 1.5 HP Up Rate Motor, Round Flange 56J Frame, Single Speed - Model UST1152​

I'm sorry for any confusion I initially caused if this has any bearing on what you previously told me above.
 

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You can go with a SPX3010C impeller or smaller.

How much flow do you need?

Century (A.O. Smith) 1.5 HP Up Rate Motor, Round Flange 56J Frame, Single Speed - Model UST1152

1733602345018.png
Impeller.....Total HP required.

SPX3005C......0.75
SPX3007C......1.10
SPX3010C......1.5
SPX3016C......2.0
SPX3021C......2.5
SPX306C......3.45


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1733602677472.png
 
I haven't a clue what flow rate I need, how do I figure that out?
I've found a link to a chart below.
It's a weird shaped pool, the closest similar design is a kidney shape.
Using the calculator I estimate it to hold no more than 15,000 gallons.
I currently run the motor for 6 hours a day, but in the summer here in AZ when temperatures hit 100+ on a daily basis it obviously needs running much longer.
I hope this information helps!
Pool Flow Rate Calculator - Blue-White Industries.
 
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I don't have a pool heater so I'll have to invest in a dry suit, LOL!
We pay nearly $500 a month in electricity during the 'eternal' summers here, so I'm glad for a little financial respite in our so-called 70F+ 'winters'.
Thank you ever so much for all the great information you have shared, it was very enlightening to say the least!
 
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