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Thread: I installed a Pentair intelliflo XF over the weekend

  1. Back To Top    #1

    Join Date
    May 2013
    San Jose, California

    I installed a Pentair intelliflo XF over the weekend

    I installed a Pentair Intelliflo XF over the weekend. It works great and silent. I run at a low 1100 RPM / 130Watt. I do not know the flow rate yet (some 25 GPM?). It should give some ~4x electricity cost reduction compared to the old 3kw pump it replaced. That should pay for the investment in ~2 years. I'm on a TOU electricity rate plan from PG&E here in California that makes it advantageous to run the pump off-peak overnight (20c/kWh), and really expensive (56c/hWh) to run it on peak hours.

    At low RPM the pump is whisper quiet. The is some minor low-frequency shaking in the plumbing, a little like a car engine idling. I cannot really find the source for that (backflow valve, air bubbles, ? ).

    The only install issue is what the previous posters noted: the 2.5ID 3.0 OD connectors are a pain! What where they thinking by using this unusual diameter? Eventually I found the 3" to 2" reducers at ACE hardware, but that piece is made out of black ABS. Its visible on the picture. So I had to use a special ABStoPVC glue on both ends. That bond is likely not as strong as native PVC glue, while 3->2 reduction this is the most stressed location in the entire plumbing. But probably it is good enough. Its holding up fine until now...

    One missing feature would be to be able to program the run time of the pump based on the water temperature. Currently you have to program a fixed schedule that must be changed manually (e.g. for summer/winter). The pump has a temperature sensor for its anti-freeze operation. So it should be possible to auto-adjust pump run-time based on the water temperature. That would save more energy as the pump automatically runs more in hot weather and less in mild weather.

    While at it, I took the occasion to re-plumb all 2" pipes and installed a new Jandy backwash filter. I tried to avoid 90-degree turns, using multiple 45-degree corners instead. Hopefully that reduces resistance a little. I ordered the pump and the Jandy backwash valve online, at a total cost of ~$1100. It took me a full day to install, most of the time spend in round-trips to Home Depot to get the right plumbing parts.
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  2. Back To Top    #2

    In the Industry

    Join Date
    Sep 2013
    Fresno, CA

    Re: I installed a Pentair intelliflo XF over the weekend

    You ordered the XF which is really meant for installations on new builds, that is why it comes with the larger connections on the pump, no big harm there. Keep an eye on those ABS connections, I've seen them used before. The product that you should have ordered was, 011018 by pentair, that has 2" threaded ports on it. But no harm. The savings will save you big time alone. On the flow rate you are probably in the range of 40-50gpm, depending on the piping, resistance, head, and so on. The low frequency shaking, harmonic vibration is somewhat normal with those pumps, it does cavitate a small amount. With the electrical savings why worry about the amount of run time in the summer versus the winter. Just curious, what type of pool cleaner do you have?

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