Model # HD-RO 4000

Internet #203208938

Watts Reverse Osmosis Annual Filter Replacement (5-Pack)

Discontinued Watts

Reverse Osmosis Annual Filter Replacement (5-Pack)

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Frequently Bought Together

Product Overview

This annual replacement 5 pack filter kit includes two 5 micron sediment filter and two 5 micron carbon block filters and 1 granular activated carbon filter. The sediment filter traps sediment and other particulate matter, such as dirt, silt, and rust which affect the taste and appearance of your water. The 5 micron rating is in the particle filtration category and equivalent in size to milled flour. This filter is designed to be changed out every 6 months or 1350 gal. The granular activated carbon is made from raw organic materials, such as coconut shells or coal, which are high in carbon and heat is used to activate the surface area of the carbon. The activated carbon removes certain chemicals like chlorine from the water passing through a GAC filter by trapping the chemical in the GAC. This filter is designed to be changed out every 6 months. This filter pack contains 2 sets of filters for a 1 year supply.

  • Mess free filter changes
  • 2 quick change sediment filters
  • 2 quick change carbon block filters
  • 1 granular activated carbon filter

Info & Guides

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


Brand/Model Compatibility
HD-RO 4000
Filtration Method
Sand or Sediment
Filtration method
Sand or Other Material Sediment
Product Weight (lb.)
Water Filtration System Type
Reverse Osmosis

Warranty / Certifications

Manufacturer Warranty
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.

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Customer Questions & Answers

See below

Hi, Will these filters work on the Watts Premier reverse osmosis system. Stage 4 Serial number 08WPI- 518258 and are these all the filters i need.
Asked by: barr
Hi, Yes these filters will work on the Premier reverse osmosis system. Please let us know of any other questions or concerns. Thank you, Watts Retail Group Customer Service
Answered by: WattsWater
Date published: 2015-09-20

Will this replacement filter pack work with our Watts Premier Zero Waste RO System Model ZRO-4?

I was chatting with an online person but was disconnected. I am having difficulty finding a match to fit our RO and it is time to replace all of the filters. Thank you for your assistance. Ilene
Asked by: Ilene
Hi Ilene, This filter pack will not fit your RO System Model ZRO-4 Mike,
Answered by: Jet1
Date published: 2015-11-07

Will this filter pack work on my Model:RO-PURE serial number 08WPI 514671

Asked by: Frank
No, the filter Kit listed will not work with the RO Pure systems. This kit has ‘quick turn’ filters that are not compatible and includes a GAC filter that is not used with the RO PURE.
Answered by: WattsWater
Date published: 2015-09-17

Is this product in stores or do I have to order it online only?

Asked by: Anonymous
Product will need to be ordered online.
Answered by: WattsWater
Date published: 2015-09-17
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Customer Reviews

Reverse Osmosis Annual Filter Replacement (5-Pack) is rated 3.0 out of 5 by 2.
Rated 1 out of 5 by from The picture is wrong. The picture doesn't match the product. In picture, it includes one filter of each stage from 1 to 4. But the real product has two stage 1, two stage 2 and one stage 4, no stage 3. I will return it. It is not what I need.
Date published: 2014-06-25
Rated 5 out of 5 by from Filters Only As it says in the description, you get 2 each of the filters that are recommended to change every 6 months (#1 &#2) and one filter that is recommended to change every 12 months (#4). The RO membrane (#3) is recommended to be changed every 36 months, so it is sold separately.
Date published: 2015-08-31
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