Aquasana undercounter water filter system Review

I have a water well, so I do NOT want to restrict water flow to my kitchen sink faucet...!!!

As soon as I installed their AQ-4000 "sink top" model-
I noticed it took MUCH MUCH longer to fill the sink with unfiltered water (for dishes...)?!
I removed their aerator assembly..., and discovered it had a "non-removable!" VERY SMALL 5/32"..., "permanent" METAL restrictor hole!

I then installed their optional "Under-Sink Install Kit" (AQ-4056 (best), or AQ-4050 (MUCH less$)) .
This complete kit has a faucet that mounts to sink-top (NOT very easy, but worth it!- Drill 7/8" hole, mounting bracket screws are too large..., connect new water-T...)-
I now have good filtered water, and a "normal" water flow at the sink faucet! :o)
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UPDATE!- CONS (after using it for 6mo.- I'd now downgrade it to a 1 (they don't give 0!)!-
1. Changing the filters is a HASSLE! Had to work hard & gouge the down filter out with several tools (sticks BADLY!). Yes, it started leaking too!
Reverse Osmosis/distllled water has a BAD ph, and necessary minerals are removed!

2. I since got a Whirlpool UltraEase "PLUS!" under sink water filter mounting kit (Lowes only). Lines from AQ4000 fit it to the sink top faucet. They also carry sink top faucets, and filter mounting kits (in-store- couldn't find mounting kit online?).
Review the filtration specs on thisNSF (govt.) approved Whirlpool "Plus" filter- lead/flouride/cysts/..., VERY impressive specs., for most home users!

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Product Description:
Aquasana undercounter water system 4000 includes everything you need to install a Consumer Digest "BEST BUY"-rated Aquasana AQ-4000 water filter under counter. The combo inlcudes filter and an attractive, convenient, lead-free faucet and all the necessary fittings, tubing, brackets, etc. Offer includes Aquasana AQ-4000 filter, a faucet, and all necessary fittings and brackets to install filter under counter. The Aquasana 4000 Undercounter far exceeds all the stringent NSF testing for standards 42 & 53; State of California Health Department Certified Aquasana 4000 Undercounter #99-1407 as well as IA, WI, CO, etc. For municipally treated water only. This undersink filter removes 99% of chlorine, 99% VOCs, 99% lead, 99% THMs, 99% Benzene, 93% MTBE and many other water contaminants. The filter provides filtration to 0.5 microns while leaving in all the healthy, natural trace minerals for great taste.

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