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Thanks for the information! I'm gonna do my test, and if it turns out the Pentair is more accurate I'll probably try changing to the FloVis. This is a commercial pool, not a residential pool, AFAIK there is no requirement on residential pools and I've never heard of any sort of required...

Yup, but also part of why I want to look at it, is if there is ever a new inspector and he looks at the Pentair flow rate instead of the flow meter, he could shut the pool down based off of that, and I won't really have a good answer for them as to why thats wrong. Also, occasionally if someone...

Thanks, but the thing that irks me is its even more then 30 GPM difference, I'm looking at 55 GPM off. I'm a little confused by your phrasing, since you said the pumps fairly accurate (10%) then said the flow meter is 10% accurate which is extremely inaccurate, are you saying the pump is 90%...

Thats whats been happening, I was just curious about WHY there was a mismatch and if it could be corrected. The only "problem" is the number displayed on the screen, nothing else at all

I guess you entered my question, there is no real flow meter so the VSF flow rate is probably entirely inaccurate since its just based on RPM and presumably some flow restrictions? Sorry, forgot to mention this is a commercial pool, it has a required flow rate on the permit to be open. It has...

I'm sorry, it was a 3" pipe, this is the flow meter installed: https://www.amazon.com/gp/product/B007CU0QI2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 How does the pump automatically speed up as the filter gets dirtier if it doesn't have any built in flow meter?

Last year, in the middle of pool season, we a pump fail and need replacement and I had an Pentair Intelliflow VSF-XF 3 HP pump installed. When it was setup, the flowmeter after the pump on the return line to the pool was also replaced (2" pipe, 2" flow meter). From when the pump was installed...

I'll have to give the vitamin C thing a try and if not the Magic Stain Stain ID... I'm struggling a bit with why when I threw them in initially it cleared up an area but I can't repeat it now... My pool is marcite/plaster in ground, 2 hp pump, I'd guess around 20,000 gallons but I gotta...

A couple years ago, I bought a place out of foreclosure with a pool that was neglected for years... when I bought it, the pool was a total swamp, with frogs, tadpoles, and lots of other stuff growing in it, worse then anything I've seen. I knew you weren't supposed to drain the pool as with the...