Hayward EC40AC Perflex Extended-Cycle D.E. Pool Filter vs Hayward S166T ProSeries Sand Filter, 16-Inch, Top-Mount

The Hayward EC40AC Perflex Extended-Cycle D.E. Pool Filter is a great Pool Filter for its $419 asking price.

The Hayward S166T ProSeries Sand Filter, 16-Inch, Top-Mount, on the other hand, is not worth its $799 price tag and should be avoided by most people. We strongly suggest that you take a look at some better alternatives if you're considering spending around $650 on a Pool Filter.

The Hayward EC40AC Perflex Extended-Cycle D.E. Pool Filter was loved by reviewers at The Spruce, a trustworthy source that performs objective hands-on testing. It did great in their "The 4 Best Pool Filters of 2022" roundup - in fact, they named it their "Best DE". That, by itself, points toward it being a noteworthy Pool Filter.

As for the Hayward S166T ProSeries Sand Filter, 16-Inch, Top-Mount - it wasn't considered to be a good enough purchase to earn a spot in any roundups conducted by sources that perform objective hands-on testing, which typically indicates that a product isn't worth its asking price.

As a last step, we wanted to do a head-to-head Hayward EC40AC Perflex Extended-Cycle D.E. Pool Filter vs. Hayward S166T ProSeries Sand Filter, 16-Inch, Top-Mount comparison of their review performance but, unfortunately, weren't able to find any review ratings on either product.