Rebuilt Pump Doesn't List Service Factor or model #

Hi all,
The problem i'm having is that I need to replace my current pool pump. Unfortunately, the previous owner used a rebuilt pump, and I can not figure out what the service factor is. The only ifo on the rebuilders label is:

Manf AO Smith
HP 1.0
Volts 115/230
Amps 20/10
RPM 3450
Frame 48Y

Nothing about service factor and no model # to cross reference. It seems when choosing a replacement, service factor is important. Does anyone have any suggestions on what I should do. short of just taking a shot in the dark and picking one with a service factor of aroung 1.6? Also the current pump is single speed and I plan to replace it with a 2 speed pump.

Thanks in advance for any insight or help anyone can give me

That label almost has to be bogus -- 1 HP pump drawing 20 amps? No way.

I'd recommend that you ID the impeller (most have numbers on them) and match the motor to the impeller. Residential pool pumps typically have one case, used for pumps from 1/2 - 2 HP, and change only the impeller and diffuser.

If there is no SF listed, it is usually 1.0. But it may help if you can post a picture of the pump itself. Certain pump lines only come in up rated versions.

Thanks for the replys.

So after taking it apart and cross referencing the impeller # with the # on the strainer lid I've come to the conclusion that the motor is an AO Smith SQ1102. It appears the rebuilder likes to round up as the Amps are actually 19.2/9.6 it is indeed 1HP with a SF of 1.65. Needless to say this thing must suck a lot of energy.

So I sought out a replacement 2 speed pump and maybe you can help me decide which you think is better. For $300 I found an AO Smith SQS1102R full rate with a HP of 1-1/6 a SF of 1.65 and an amp draw of 9.5/2.5. But for $50 more I found a discontinued AO Smith UQS1202R up rate with a HP of 2-1/3 SF 1.1 and an amp draw of 10/3. So I guess my question is, do you think it's worth the extra $50? I figure twice the HP an increase in the total service factor of .55 with just a minimal amp gain of .5 kinda seems like a no brainer for $50 extra bucks. What do you guys think? Thanks again for all your help.

The amp draw listed on a motor label is simply the maximum rating. It doesn't tell you what the actual amp draw will be for the motor. That depends on the impeller and the plumbing and motor efficiency.

Also, the 2 HP is not really twice the HP. The first motor has a THP (total HP) of 1.65 (1*1.65) and the second motor 2.2 THP (2*1.1). So that is a difference in THP of only 0.55. But that doesn't doesn't buy you anything since the two motors will draw about the same power so save your money and go with the cheaper motor.