Pool Pump Replacement Question

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bg13

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Feb 2, 2017
9
naples, fl
I purchased a new pump (hayward sp2610x15 1.5hp) after my current pump (Century HSQ 165 1.5hp) stopped working. I thought all of the specs matched up to the existing pump. hp, volt, amps, frame - all match.

The one item I missed was the size of the inlet and outlet pipe on the new pump. My pool has 2inch pipe but the new pool pump has inlet and outlet for 1.5inch pipe.

Is it okay to use a reducer coupling to install the pump or do I need to return this and buy a new pump that has 2 inch inlets?
 
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Are you sure that it's 3" pvc? That's unusual.

3" schedule 40 pvc has an outside diameter of 3.5".

Also, the pipe should be marked with pipe specifications.

Is there some reason you need high flow?

What were the inlet and outlet size of your old pump?
 
The diameter of the pvc pipe is 3inch. The old pump had the 3inch diameter pipe directly into the inlet - no reducers.

The installation diagram for the new pump says the inlet takes 1.5 inch pvc.

Will using the reducers reduce the flow significantly? pool has a floor cleaning system and a few jets in the hot tub.





JamesW said:
Are you sure that it's 3" pvc? That's unusual.

3" schedule 40 pvc has an outside diameter of 3.5".

Also, the pipe should be marked with pipe specifications.

Is there some reason you need high flow?

What were the inlet and outlet size of your old pump?
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What was the exsisting pump make and model. I can't find a hayward model 2510, just a 2610 which is a Super Pump. This pump is considered a medium head pump and probably won't work well with infloor cleaning system or spa jets
 
That is 2" plumbing. It is based on the inside diameter of the pipe. The outside diameter of the pipe will be about 2-3/8" and the outside diameter of the elbows will be larger.
 
re-measured and you are correct. the pipe entering the old pump measures 2-3/8" and the inlet on the new pump is 1-7/8"

Do you have any recommendations on what pump is best?



pooldv said:
That is 2" plumbing. It is based on the inside diameter of the pipe. The outside diameter of the pipe will be about 2-3/8" and the outside diameter of the elbows will be larger.
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One suggestion when you get everything sorted out - use threaded union flanges on the pump intake and return sides. That way, any future pump work means you don't have to hack-saw off the PVC pipe and glue things back together.
 
The pump you have is the Sta-Rite Maxi-ll, which is considered a high head pump. This means it can deliver more gpm at a higher pressure, which is needed to run a infloor cleaning system or spa jets. Even though you bought a pump with similar hp that is all they have in common. As the system is now what is the pressure on the filter guage when operating normally?
 
around 20psi

Do you have a suggestion on what pump or pump motor to replace it with?


kadavis said:
The pump you have is the Sta-Rite Maxi-ll, which is considered a high head pump. This means it can deliver more gpm at a higher pressure, which is needed to run a infloor cleaning system or spa jets. Even though you bought a pump with similar hp that is all they have in common. As the system is now what is the pressure on the filter guage when operating normally?
Click to expand...
 
Could I replace the motor with the below 2 speed motor instead of a whole new pump? or does this pump only work with a single speed motor? [h=1]http://www.inyopools.com/Products/07501352062874.htm[/h]

Also, is there any disadvantages of replacing a motor vs replacing the whole pump?



kadavis said:
The pump you have is the Sta-Rite Maxi-ll, which is considered a high head pump. This means it can deliver more gpm at a higher pressure, which is needed to run a infloor cleaning system or spa jets. Even though you bought a pump with similar hp that is all they have in common. As the system is now what is the pressure on the filter guage when operating normally?
Click to expand...
 
The decision to replace motor or whole pump is difficult, because of several circumstances to make that decision. One would be your budget, another would be the age of the pump housing. As far as what pump or motor would be better a two speed or variable speed will definitely bring down the electric bill.
 
As the previous person stated the Super Pump is a medium head pump that is not suited to run a floor cleaning system. I see from the pictures you have a valve for the system. You will need a high head pump if running the floor cleaning system is a must. Not sure what floor cleaning system you have but they keep specs from the builders and may be able to size a pump from multiple pump manufactures.
 
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