We have an 18,000 gallon above ground pool with a sand filter and an ic40 Intellichlor SWG. Our 2 spd pump died at the end of last summer. We only ever used it on high speed because the low speed didn't generate enough flow to run our Intellichlor SWG. I need suggestions for a replacement pump that will be energy efficient AND produce enough flow to run our Intellichlor properly.
new pump recommendations
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A variable speed pump would be the way to go. Unfortunately, we don't currently have many options for a 115v variable speed pump. Hayward has model SP26115VSP but it's only a .85HP pump. This would be a little undersized. If you can have 230v supplied to the, you'll have more options.
The 230v variable speed pump that we'd recommend is the PureLine model PL2605. That is a 1.65HP pump.
I've been told that our chlorinator needs to have a minimum flow of 25 gpm. Is there a 2 speed pump that will generate at least 25 gpm on low speed?
We don't really want to get into changing the electricity supplied to our pump, so it looks like a variable speed pump is not going to work for us.
I'll check out the Pentair. What about the Hayward PowerFlo Matrix model SP15932S? I've been leaning toward it.
How can I tell which pumps will provide at least 25gpm on low speed?
I'm checking with Hayward to see if I can get the low-speed power curve or if they can confirm it will push 25 gpm on low-speed. I'll reply back as soon as I get a response.
The Hayward rep said there wasn't a power curve for the low speed of the SP15932S. He said that the pump, on low-speed, would likely produce 30%-40% of the full speed flow. If the feet of head is less than 20', the full speed will produce 91 gpm. This means the range would presumably be 27-36 gpm on low-speed.
Thanks so much for your input! Is there something I should look for when looking at pump specs that would give me an idea of the pump's gpm?
The feet of head in our plumbing configuration is definitely under 20'.