The AP810 from Aqua Pure has been a good filter for our home since June 2003. Our city water is very hard from iron which made our first hot water heater only last 10-years and had impacts our hot water boiler through initial fill and thru make-up water. Now we run an inhibitor and a noise reducer for our boiler. Since installing the AP-801/AP810 filter assembly, the second water heater lasted 15 years, the boiler is still running good, and our third hot water heater is 10-years old and still running well too. Each time I remove the filter and after drying out it is a red color. The first filter removed was a deep red but has lightened some over the years. We still use a Brita water filter in our refrigerator for our drinking water, but the AP810 is a good filter for our whole-house water. The only other thing I would say is the price has gone up over the years and I usually buy a few or more to get a discount, but that seems to have gone away too. Art (NY)
