Search  for anything...

AO Smith Single-Stage Whole House Water Filter - Included Replacement Timer

  • Based on 95 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $12.83 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, May 23
Order within 3 hours and 52 minutes
Available payment plans shown during checkout

Features

  • Longer lasting appliances - whole house filter system designed to reduce sediment from every tap.
  • Reminder Timer - tells you when it's time to change your filters.
  • Filter system can be used as a stand alone system or with additional A. O. Smith Systems.
  • Large capacity (4.5") filter is perfect for household sizes of 4+ people - Limited 1 year warranty.
  • Includes filter housing, housing wrench, and reminder timer. Filter cartridges sold separately.

Manufacturer: ‎AO Smith


Item Weight: ‎7.96 pounds


Product Dimensions: ‎14.96 x 7.76 x 7.64 inches


Item model number: ‎AO-WH-PREL


Color: ‎White


Measurement System: ‎English/Standard


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: April 26, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, May 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Get this if you want a quality filter housing.
I did a lot of looking and researching for a good quality filter housing and finally decided to take a chance on this AO Smith unit and I'm glad I did. This is a very stout well built unit and it is easy to install. I designed and built my own system and put 2 of these single-layer filters in series with each other and a 50 micron spin down filter and then into a water softener and the difference is unbelievable even with the softener in bypass or regen mode. No more wierd taste, no more stinky sulfur smell and best of all no more clear water iron stains or water stains at all. We'll worth the money and another major advantage to these units is the female threaded fittings are brass on the inlet and outlet ports which is way better than the plastic hook ups everyone else seems to offer. The only thing I'd like to see done differently is if they could add a pitcock valve on the bottom of the housing to drain the water out before removing the filter for maintenance or replacement. It's not a big deal to me but it is a little heavy and you have to be careful when removing it or you'll have a big mess to clean up. ... show more
Reviewed in the United States 🇺🇸 on June 6, 2022 by Allen Davis

  • This water base filter is very strong and you can see it the water will coming clean
For the prices I have this water filter base is great
Reviewed in the United States 🇺🇸 on September 25, 2022 by johnny H.De La Rosa

  • Needed!
Love this filter housing. We added this to our well water supply. There was NO filter on the water line to our house when we purchased it. I am using it with a 20 micron filter to filter out sand, dirt, debris, and other particles. Works very well. My filter comparison photo is just after 3 months. This is about how often I will put a new filter in. I used adapters to go from the 1" housing thread to 3/4" male pex. Works great! Another reviewer gave me the idea of adding a 1/4" ball valve to the bottom of the housing (thank you!). This will allow for easier filter changes. I drilled and tapped 1/4" NPT threads into the acylic housing. See pics. ... show more
Reviewed in the United States 🇺🇸 on December 13, 2021 by Amazon Customer

  • Don’t leave in a sunny area
Do NOT leave in a area where sun hits it because it will be filled with algae in days! We had to make a makeshift box to go around it to protect it from the sun because it was a pool of bacteria
Reviewed in the United States 🇺🇸 on October 23, 2022 by Elena

  • Heavy duty
Much heavier than expected, very solid construction. Used before a whole house descaler.
Reviewed in the United States 🇺🇸 on April 1, 2022 by Eric Mason

  • Easy to use
The pressure release button is a great feature. The clear plastic case makes it ease to to check the condition of the filter
Reviewed in the United States 🇺🇸 on February 3, 2022 by Wade

  • The filter being clear so a person can see how dirty the filter is.
It would be nice if the filter had a 1/4" drain valve in the bottom. It might be a little heavy and very easy to spill when full of water for some people. I drilled and taped a 1/4" drain on mine. This is my second one, first froze, to me the timer is useless, I change filters by how dirty they are. Thanks ... show more
Reviewed in the United States 🇺🇸 on April 21, 2021 by Steven Donnell

  • Great filter, high quality setup.
Installed this on our well...water didn't seem bad before, but this made it even better. You can taste and feel the difference. I was surprised that the filter clogged up after 2 months. Water pressure dropped a couple days beforehand and then it abruptly stopped. If you notice this, make sure you have another filter on hand or you can just remove the filter to get your pressure back. ... show more
Reviewed in the United States 🇺🇸 on January 28, 2020 by Jan E. Olek

Can't find a product?

Find it on Amazon first, then paste the link below.