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i think you can open jandy valve from the top and fix things there if needed

Mark, thanks for the info. I was under impression that ball valve would have zero head loss - looking thru the valve it seems that when it is open, the opening in the ball lines up perfectly with inlets of the valve. in other words, the diameter of the hole in the ball is the same as pipe...

Mark, what valves would you recommend with the least head loss?

will do

Mark, I'll get the numbers when I have the pump up and running. Right now it's all assembled and dry tested. Should i post the #s to this thread? it will be at least another month before i open the pool.

Bama, thanks for your reply. If I knew the amperage, then there wouldn't be any problem figuring out the wattage. I was wondering if there are other ways:

how do i guestimate the wattage? is there a formula?

I have an old SP2607X10 superpump. I replaced the original 1 speed motor with new 2 speed STS1072RV1 one and now I would like to figure out the flow rates and wattage for the new configuration. I’m getting a vacuum gauge so using filter pressure and vacuum readings I will be able to figure...

Re: STS1072R vs STS1072RV1; capacitor hump; "Conservationist it looks like it's only available with 56Y frame, at least i can't find 56J that i would need. 1 amp max on low speed is nice. for STS1072RV1 low/high MAX amps are at 1:2.5 ration (2.2:5.4) which almost negates the idea of running on...

Re: STS1072R vs STS1072RV1; capacitor hump; "Conservationist d*mn it! makes sense. i was looking at it for the range of RPMs not realizing it was for single high speed

Re: STS1072R vs STS1072RV1; capacitor hump; "Conservationist well, i got the answer to my question from AO Smith today plus some more additional information that i think i should share since with the people who participated in this topic. Below is one of the internal emails within AO Smith...

James, thanks for the clarification!

i just realized that the entire pump facing surface of the seal plate #13 is sealed against the pump body, so the drain is not exposed! so it's all good

The slit i was concerned about was in the seal plate #13. I think you're talking about the one in motor mount #14. if you look at the picture, #13 on the bottom has a line, that's the drain i was curious about and this one doesn't seem to be sealed. but i guess it's ok if it works properly and...

But then it seems that when pump is running there will be high pressure between seal plate and pump housing and the same pressure that pushes the water up the pipe, will push the water down the drain slit? i don't have the pump in front of me, but i think i remember that drain to be fairly open..

Mark, I was trying to see where the wet/dry line is in the wet part of the pump. Looking at the pump and the diagram it looks like the diffuser is sealed against pump housing and the water enters the diffuser from the pump strainer body. It then travels to impeller, is spun around and exits the...

that's quite the difference! :mrgreen: i do have that and it makes sense to have it there. thanks!!

ok, the situation with the seal is resolved, wet end is all assembled and wiring is done. however, looks at the exploded diagram of the superpump, i noticed something that made me think hmm... here is the diagram (pic1) and here is my impeller (pic2). the diagram implies that there is a gasket...

thanks. i need to do some testing anyway since i would have to figure out the right settings to keep my pool chlorinated in my absence. but it's nice to know it might work. there is always an option to run on high speed for the required duration of course.

reading another post on this board made me think if my inline pentair chlorinator will work when pump is running on slow speed. i would think there wouldn't be enough flow to push the water into the chlorinator. but i might be mistaken. i will try when the time comes to use it (low CYA...

Mark, thank you for following up on those questions of mine, it's useful information to have. Thanks again!

man! i typed a big a** reply saying how i figured out the mystery with pictures and such and then i checked and you beat me to it! that's exactly what it was!! i looked up the impeller online by the part number that my wife looked up for me on the old one (sp2607-c) and i noticed it looked...

i looked it up energy factor in your cool "Hydrolics 101" topic and it seems that it's basically pump efficiency. so does 10% increase mean 10% more water pumped per given watt-hr, or is it 10% less watt-hr per given volume of water pump? in other words, if standard size impeller pumps one turn...

Mark, I will check on existing impeller first before proceeding. But I was wondering, would you elaborate a bit on different impeller sizes? It's my understanding that it's possible to upsize or downsize the impeller per given motor/pump. Are there any advantages for that? Will new impeller...

Mark, thanks for your response. I'll have to take a look at the impeller at home tonight. I have bunch of pics here, but they only show one side of the impeller and there are no visible numbers on the pics. it's possible that it was replaced, i inherited the pool when we bought the house...

I have an old SP2607X1 superpump with SP-1607-Z1-M motor. I’m replacing the motor with a new 2 speed STS1072R motor. I got the old motor off the pump and removed the wet end. I started to put everything together just to find out that the new seal doesn’t fit the impeller! I got “HAYWARD...