Replace motor or entire pump?

Scarpaggio

In The Industry
Aug 16, 2019
10
Mobile, AL
Looking for some advise on what to do with this pump. Just the other week it started making a real high pitch noise while running. Been in the house a year and a half and have no history on the pool equipment. Actually had the liner replaced this past summer.

The pump is exposed to the elements in South Alabama. I intend to cover it here shortly. The stickers on the pumps are extremely faded but I'll add what I can here. I know the pool is about 25000 gal but I couldn't tell what the plumbing is like to calculate what pump I'd need.

Pump Model _ _ _ A5D-12OL. First three may be P2R What I can tell is it is a Sta-rite Dura-Glas

Motor is not original: U.S. Motor 1081 Pool Motor - I think the original motor was 3/4 hp.

Cat No. EUSQ1102

Model No. C55CXKLS-5006

H.P. 1

S.F. 1.25

HZ 60

RPM 3450

I'm not sure if any other info is needed but with these pictures is it worth while replacing the motor or the complete pump and which one for either.
 

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BowserB

Silver Supporter
Jul 29, 2018
588
Katy, TX (west of Houston)
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
This could be your opportunity to consider moving to a variable speed pump. Compare the costs of replacing the motor on your old pump, to a new variable speed, modern pump. The VS pump can save electricity and can also be much quieter, if that is a concern. My Pentair Intelliflo VSF 3HP at full speed (3450rpm) draws 2530 watts. At 1/2 speed (1725rpm), 298 watts. At 1300rpm, 111 watts. I run the pump at 1650rpm (260w) for 8 hours from 2am to 10am (cheapest electricity for us) and from 2 to 4pm to skim the surface. That's my schedule. Of course from time to time or when in use, or when using the heated spa, I'll run the pump manually at various speeds. I also have a water feature pump (2184 watts--ouch) which I run 5 minutes a day on a schedule or when we have visitors. Based on my (far too extensive) records of kwh and costs before the pool, after the pool was opened, and then after I adopted my current pump schedule, I figure running my pool pumps, plus the UV-C and Ozone appliances, costs me under $15 a month--about 10% of my total electric bills.

Noise, wear. When the pump is running, you have to be within about 20 feet of it to hear it, and if the A/C condenser is running about 40 feet away, you can't hear the pump at all. Also, while I have no proof of it, I suspect wear on the pump and motor are reduced significantly at lower speeds, if the difference in power requirements is an indication. So you can run a variable speed pump at 1/2 speed for twice as long as you would at full speed, and it still costs you only 1/4 as much to operate. The cost savings wouldn't, in my opinion, justify replacing a working pump. However, your situation may warrant at least taking a look at a VSP.
 
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Scarpaggio

In The Industry
Aug 16, 2019
10
Mobile, AL
This could be your opportunity to consider moving to a variable speed pump. Compare the costs of replacing the motor on your old pump, to a new variable speed, modern pump. The VS pump can save electricity and can also be much quieter, if that is a concern. My Pentair Intelliflo VSF 3HP at full speed (3450rpm) draws 2530 watts. At 1/2 speed (1725rpm), 298 watts. At 1300rpm, 111 watts. I run the pump at 1650rpm (260w) for 8 hours from 2am to 10am (cheapest electricity for us) and from 2 to 4pm to skim the surface. That's my schedule. Of course from time to time or when in use, or when using the heated spa, I'll run the pump manually at various speeds. I also have a water feature pump (2184 watts--ouch) which I run 5 minutes a day on a schedule or when we have visitors. Based on my (far too extensive) records of kwh and costs before the pool, after the pool was opened, and then after I adopted my current pump schedule, I figure running my pool pumps, plus the UV-C and Ozone appliances, costs me under $15 a month--about 10% of my total electric bills.

Noise, wear. When the pump is running, you have to be within about 20 feet of it to hear it, and if the A/C condenser is running about 40 feet away, you can't hear the pump at all. Also, while I have no proof of it, I suspect wear on the pump and motor are reduced significantly at lower speeds, if the difference in power requirements is an indication. So you can run a variable speed pump at 1/2 speed for twice as long as you would at full speed, and it still costs you only 1/4 as much to operate. The cost savings wouldn't, in my opinion, justify replacing a working pump. However, your situation may warrant at least taking a look at a VSP.

I am considering this I guess where I'm lost is what size pump, or what size replacement motor. Since the original for this pump was a 3/4 hp motor and it currently has a 1 hp motor. I have a secondary pump running a Polaris 360. I've looked at sizing pumps but not knowing anything of where my plumbing actually goes under ground I'm not sure what size pump I need.
 

BowserB

Silver Supporter
Jul 29, 2018
588
Katy, TX (west of Houston)
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
If you post your pool info here (gallons, number of skimmers, returns, etc.) someone here will probably help you. Also if you talk to a dealer, you can probably get advice. Note with some mfrs--Pentair, for example--a long warranty is only provided with a professional installation. My 3 HP pump is for 15k gallons plus spa, 2 skimmers, two main drains, 7 pool returns, six spa returns.
 

Scarpaggio

In The Industry
Aug 16, 2019
10
Mobile, AL
So any suggestions for size of pump for a pool that is 25000 gal, 2 skimmers and 3 returns. Filter/pump are about 40 ft from pool. Skimmers are on far side of the pool and all 3 returns are on the side where the pump/filter are located.
 

sktn77a

Gold Supporter
May 16, 2010
2,177
Chapel Hill, NC
Probably an Intelliflow 3HP VS or a Superflow 1.5HP VS, depending on existing plumbing (1.5" vs 2") and any future intentions of automation.
 

1poolman1

In The Industry
Jul 14, 2014
114
Sacramento
You should go with the Pentair IntelliFlow or the Sta-Rite IntelliPro. The Superflow is a medium-head pump that may not run the Polaris 360 to your satisfaction. The benefit to the larger pump is that it can be "turned down" to the proper speed for your needs. What you have now is an old StaRite Max-E-Glass. Pentair bought Sta-Rite several years ago.
 
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