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SKU #: XWP1002

Watts Premier WP-4V Reverse Osmosis System

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Watts Premier WP-4V Reverse Osmosis System


  • VOC Carbon block filter
  • Easy to Install
  • Four stage manifold (complete with filters)
  • 3 Gallon storage tank
  • 1 - 5 Micron sediment: Reduces dirt, sand and rust
  • 1 - 5 Micron carbon block: Reduces chlorine, objectionable tastes and odor
  • 1 - 35 GPD Thin Film Composite Membrane Filter: High production thin film composite membrane separates unwanted impurities from your water
  • Operating temperatures: Maximum 100°F (37.8°C) and minimum 40°F (4.4°C)
  • Operating pressure: Maximum 100 psi (7.43 g/cm2) and Minimum 40 psi (2.80 kg/cm2)
  • pH Parameters: Maximum 11 and minimum 2
  • Iron: Maximum 0.2 ppm
  • TDS (Total Dissolved Solids) (1800 ppm)
  • Turbidity:< 5NTU
  • System NSF tested and certified against NSF/ANSI Standards 53 and 58 for the reduction of the claims specified on the performance data sheet
  • NSF certified
  • 1 - .5 Micron VOC Carbon Block Filter: Reduces harmful VOC

Product Details:

  • Product Type: Reverse-osmosis
  • Filter Component: Filtration system
  • Contaminant Removal: Sediment; Chlorine taste and odor; Lead; Cyst; Chemicals; Micro-Organisms; Asbestos; VOCs and MTBE
  • WaterSense Compliant: No


  • Overall: 16.5" H x 16" W x 5" D
  • Overall Product Weight: 25.1lbs

Special Offer:

24 Issues of Better Homes and Gardens

Included with purchase ($10 value). 

Watts Premier WP-4V Reverse Osmosis System

Additional Documents

Manual sheet

Weights & Dimensions

  • Overall: 16.5" H x 16" W x 5" D
  • Cartridge Filter Height: 10"
  • Cartridge Filter Diameter: 2"
  • Fitting Size: 0.375"
  • Overall Product Weight: 25.1lbs


Product Type: Reverse-osmosisPrimary Material: Plastic
  • Primary Material Details: Polypropylene
Filter Component: Filtration systemContaminant Removal: Sediment; Chlorine taste and odor; Lead; Cyst; Chemicals; Micro-Organisms; Asbestos; VOCs and MTBE
Filter Change Indicator: YesCommercial Use: No
Country of Manufacture: United States 


NSF Certified: YesWaterSense Compliant: No
ADA Compliant: No 

About the Manufacturer

Watts Premier Inc. is headquartered in Peoria, Arizona. Since their founding in 1989, their company goal has been to develop and market high quality water treatment systems at an affordable price and to provide exceptional customer support. Water treatment is the sole focus of their company. By concentrating on their critical core market of people who demand clean water, they are able to focus on this goal.

Watts Premier's core competencies include the design, assembly, and customer support for water purification systems. Their product suite includes a complete line of water filtration products and components including filtration, reverse osmosis, water softening and custom design. Premier also exclusively holds five patents pertaining to unique water treatment systems.

Watts Premier stands behind every product they sell, and are confident that you as a customer will be satisfied with our products, prices, and service.

Watts Premier WP-4V Reverse Osmosis System

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    When you buy a Watts Premier WP-4V Reverse Osmosis System online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Watts Premier Part #: 500109 here. If you have any questions about your purchase or any other Water Filtration product for sale our customer service representatives are available to help.Whether you just want to buy a Watts Premier WP-4V Reverse Osmosis System or shop for your entire home, Wayfair has a zillion things home.
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    Customer Reviews

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    Tell us what you think about the WP-4V Reverse Osmosis System. It will help us provide you with better products in the future and help your fellow Wayfair shoppers make better purchases.

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    Average Overall Rating
    (based on 4 reviews)

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    1 star

    Best drinking water for a month

    from palm coast, FL – Verified Buyer

    Easy to install if you have any skills, water was great for about a month then it started to smell bad. I have to run the water for 30 seconds or so to get good water again. I ordered new filters but they should last at least 6 months, maybe I just have really bad water, undrinkable before.

    Was this helpful? Yes0 No0

    Yummy water!

    from Davenport, FL – Verified Buyer

    I love reverse osmosis water. The water quality in Central Florida isn't so great. But I love having the nice fresh water. The system is huge! and Takes up most of the cabinet space under the sink. The only thing was that we only have one drain. So we had to re-plum some of the pipes to make it work. Works great. Tastes great too!

    Was this helpful? Yes0 No0

    Easy install

    from POMPANO BEACH, FL – Verified Buyer

    Easy to install and compact enough to use in my wet bar

    Was this helpful? Yes0 No0

    Great System

    from Clovis, NM – Verified Buyer

    Installed in no time and does a great job on really bad water! Perfect solution for RVers who are not sure of water conditions. Suggest adding a UV light and additional after filter for not a lot more money. Then you are 99.9 % covered.

    Was this helpful? Yes2 No0

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    OUR SKU # XWP1002

    WP-4V Reverse Osmosis System is also sometimes listed under the following manufacturer numbers: 500109