Internet #204406504

Model #THD-5300.55

3-Stage under Counter Water Filtration System with Faucet in Brushed Nickel

  • Easily replace filters without disconnecting hoses or water lines
  • NSF certified to remove 97% of chlorine and 97% of chloramines
  • Built-in PID alerts you when it's time to change filters
  • See More Details

Frequently Bought Together


Product Overview

Get more from your water filter with our best performing, 3-Stage Under Counter Drinking Water Filter System. This system features superior water filtration plus increased filtering capacity of up to 600 Gal. An additional pre-filter catches sediment and reduces clogging for high sediment areas. The 3-Stage Under Counter System selectively filters out more contaminants like lead, chlorine, chloramines and cysts, while preserving beneficial minerals like calcium, potassium and magnesium. Aquasana gives you exceptional value, with water costing as little as 10 cents a Gal. when you replace your filters every six months. Each time you replace the filters, you can give yourself credit for not using 4,000 16 oz. plastic bottles.
  • Aquasana drinking water filters reduce more contaminants at the best value
  • Features a flow rate of 0.5 GPM so you get filtered water fast
  • NSF certified to remove 77 contaminants including 97% of chlorine and 97% of chloramines (chlorine + ammonia)
  • Easy to install and maintain, cartridges last 600 Gal. or 6 months
  • High performance pre-filter reduces rust, sediment and silt and reduces clogging of the filter system for areas with higher sediment
  • Easy to replace with our intelligently engineered easy-change design, no need to disconnect hoses or water lines
  • New performance indicating device (PID) alerts you when it's time to change your filter
  • Includes a stylish, brushed nickel designer faucet to match your kitchen decor featuring all metal construction
  • Eco-friendly system design reduces plastic waste by minimizing disposable plastic parts
  • Retains Healthy Minerals after Filtration

Info & Guides

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3-Stage under Counter Water Filtration System with Faucet in Brushed Nickel
Coral 3-Stage Under Counter Water Filtration System with Over 99% Lead ReductionHot Water Tank and Filtration System for Hot Water Dispensers
BrandAPEC Water SystemsAquasanaBrondellInSinkErator
NameCS-Series High Capacity Under-Counter Water Filtration System with Scale Inhibitor3-Stage under Counter Water Filtration System with Faucet in Brushed NickelCoral 3-Stage Under Counter Water Filtration System with Over 99% Lead ReductionHot Water Tank and Filtration System for Hot Water Dispensers
Contaminants FilteredChlorineLead, ChlorineLead, ChlorineChlorine
IncludesFilter,HardwareFaucet,Hardware,Installation kitFaucet,Filter,HardwareHardware,Installation kit
House Hold Size3-4 people3-4 people3-4 people3-4 people
Number of Stages1 Stage3 Stage3 Stage1 Stage
Filtration MethodGACCarbon BlockCarbon BlockCarbon Spun Fiber
FeaturesTwist and lock designFilter change indicatorFilter change indicator,Twist and lock designTwist and lock design
Ease of InstallEasy InstallDrilling RequiredEasy InstallDrilling Required
Product Type Filter System
View ProductView ProductView ProductView Product



Fitting size (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Application Type
Water Treatment
Bacteria Reduction (%)
Chlorine reduction (%)
Brushed Nickel
Contaminants Filtered
Lead, Chlorine
Copper Reduction (%)
Ease of Install
Drilling Required
Filter change indicator
Filtration Method
Carbon Block
Fitting style
Quick connect
Fluoride Reduction (%)
House Hold Size
3-4 people
Faucet,Hardware,Installation kit
Iron Reduction (%)
Lead reduction (%)
Maximum feed water pressure (psi)
Maximum feed water temperature (F)
Maximum filtered water flow (gallons per min.)
Minimum feed water pressure (psi)
Minimum feed water temperature (F)
Number of filters included
Number of Stages
3 Stage
Pack Size
Product Type
Filter System
Product Weight (lb.)
Replacement Filter Type
Under Sink Replacement Filters
Water Filtration System Type
Under Sink

Warranty / Certifications

Certifications and Listings
NSF Listed
Manufacturer Warranty
90 day guarantee, 1 year limited

Questions & Answers


How can I install this system for water dispenser on countertop and to the ice maker line to refrigerator?

Asked by Deb In Florida February 12, 2021

You can go to your local hardware store and get another fitting just like the one Aquasana sent you with your install kit. Install that fitting right on top of the fitting you installed from Aquasana then hook up the service line to your counter top dispenser. Now you have a place for the water line that feeds your filters and the water line that feeds your refrigerator. I hope I made this clear. Glad to help.

How can I get filter replacement for AQ-RO3

Asked by Duds February 2, 2021

You should be able to order them from the website or have them put on Auto-Ship.

I have the Aquasana app, but the percentage of the filter life isn't showing. My Bluetooth is on. Any suggestions? I changed the battery around, thinking the installer had it in wrong. Which way does the battery go?

Asked by Sonata January 23, 2021

Good luck with the bluetooth. I never got it to work. Now as for the filter, I love it and am on the automatic replacement program.

I recently just replaced my filters for the first time in my 3 stage filter system. Very easy to do but now my water pressure from my faucet is very weak. Any ideas? Thanks.

Asked by Billy6698 January 19, 2021

There is a flow restriction valve in each of the canister heads. Why? Because you can unscrew the canister w/o a leak.  You need at least 40 psi of pressure for the water to pass. Sometimes the valves fail. I had to punch out my first filters valve to get it to flow. Now it flows great. But the canister will shoot out water if disconnected. I have to make sure the water is off and the pressure relieved before removing canisters now.  I recommend putting in a particulate filter before the Aquasana filters so the valves don’t get plugged/damaged.

I purchased my unit at Home Depot. Can I still signup for your filter purchase program ?

Asked by Ceros Roman nose January 12, 2021

Anyone can sign up for the filter program.

What micron are the filters

Asked by Donna D January 7, 2021

Hello, Thank you for reaching out to us. The 3-Stage system includes a 20-micron pre-filter before the two Aquasana Claryum® filters. This pre-filter increases the capacity of the system from 500 gallons to 600 gallons. In addition, it improves the flow rate in high sediment areas. If you have any further questions feel free to contact us at 866-662-6885. Thank you, Aquasana Customer Support

Can the faucet head turn from side to side or complete 360 to move it out of the way when doing dishes and things?

Asked by Meredith January 5, 2021

We move ours gently side to side. We are unable to turn it 360 so I don’t know if you can. My mother had one and when she moves it quickly back and forth it tends to loosen.

can i buy the filter system elsewhere and the water for life membership from aquasana?

Asked by chiporter January 5, 2021

Hello, Thank you for contacting us. Yes, you can enroll in our water for life program contact us at 866-662-6885 to help further discuss. Thank you, Aquasana Customer Support

Does this lower the TDS level in my water? 

Asked by SammyL January 4, 2021

Scroll down to the AQUASANA FAQS, #8 8 WHAT DOES TDS MEAN? TDS is the acronym for Total Dissolved Solids, the amount of dissolved minerals and metals present in water. TDS meters tell you the concentration of dissolved minerals and metals, but are not an accurate measurement for contamination. Aquasana products reduce and remove harmful TDS like lead, but selectively retain or replace healthy dissolved solids like calcium, magnesium, and potassium. Also, click on the "Performance Data Sheet" link. (

Hi. The small o-rings on the cartridge cap that screws into the manifold have become misshapen. Can you advise what size replacement o-rings I need to buy to replace these?

Asked by LoveFilterWater December 23, 2020

Note this question is regarding the A5300+ Max Flow under counter water filter system

3-Stage under Counter Water Filtration System with Faucet in Brushed Nickel - page 2

Customer Reviews

  • 4.5
    out of 1,330 reviews
  • 92% recommend this product
Filter by:
Showing 1-10 of 1,330 reviews
Keeps Leaking!!!
My filter was installed by a professional plumber amost six months ago, but never stopped leaking. It leaks from filters and from the water connector. I always keep a towel under it. Very sad despite the fact that water tastes good and pressure from the faucet is fine too. Those who use it, you should consider shutting off your water to avoid any damage when you are out. If I had another option, I would have gone with filter pitch such as Brita instead of relying on this faulty product. I am also upset my brand new kitchen cabinet is getting damaged.
by Bedir
Response from THD-CSMar 2, 2021
Dear Valued Home Depot Customer, We have reached out to the manufacturer and their reply is, we are terribly sorry to hear that your experience has been anything less than excellent. We would love the opportunity to turn your experience around and encourage you to reach out to us at (866) 662-6885 or, so we can have you enjoying your purchase!
Wanted to love it
First of all this unit will be removed and returned when my plumber comes by. Installation wasn’t easy, needed pliers to install the 1/4 inch outlet hose. Of course one on the cartridges started leaking. Water flavor is good. We wanted to love this unit, but it has to may issues.
by If only
Amazing Product!!!
I absolutely love my Aquasana 3-Stage under counter filter! I've been buying bottled water for years and was looking for a more sustainable and cost friendly solution. Not only is it reasonably priced, but most importantly the water tastes super clean and delicious. It really makes drinking water more frequently easy!
by JeanB
I purchased the standard 3-Stage Filter System
In early November, I purchased the 3-Stage Water Filter system. It took me approximately 1-½ hours from start to finish. Upon completion, I removed the plastic insert to start the system and turned on the water supply. Amazingly, there were no water leaks. I flushed the system for 10 minutes, as required, and afterwards, had my first glass of filtered water. The water was delicious! I couldn't have been more satisfied. I unequivocally recommend the Aquasana filter system I have purchased, to anyone wanting wanting an easy-to-install, inexpensive, under-counter system.
by willie f
Good product; great value.
Reliable product. Good product; great value. Good product; great value
Second time cartridge sump busted
2nd time a cartridge sump busted. Much water damage. No reply from Aquasana, like before. Had just received replacement cartridges a few days before. Filter warning light did not come on. BEWARE AQUASANA
by Lennyjack
Response from Aquasana Customer SupportJul 24, 2020
Thank you for reaching out! We apologize if our service did not meet your expectations, and we appreciate you taking the time to share your concerns!   We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have.   Kindly email us directly at or contact us directly at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST.   Thank you,   Aquasana Support
I was dying to get this installed because my town...
I was dying to get this installed because my town water is highly chlorinated. After studying the instructions and watching the install video (highly recommend!), it took me one hour to install. It takes two people at some points (someone to hold the faucet while another tightens the nut underneath). No leaks, functions perfectly and the water tastes GREAT!!!! Don’t know how I lived without it all these years. Highly recommend.
by LP
Do not like it
i hate it. It’s very noisy !!! It takes five minutes to empty tank and three hours to refill. Too slow of a process! Very very noisy!
by Lynnie
Great Product and easy to install
This product is awsome and very easy to install. The water is very clean, refreshing and tastes great. Filters lasted more than 8 months. The Andriod app helps a filter life remaining. Great product
by Humsleo
When we had our kitchen of forty years remodeled, our contractor suggested that we add a bar sink. It was on this sink that we added the Aquasana three stage under counter water filter. Since we have had it installed we not only use it for drinking water but for our coffee maker and when preparing tea. As time goes on I know we will use it even more.
by Happy Family
Showing 1-10 of 1,330 reviews