Watts Premier 4SV 500025 Reverse Osmosis System

The Watts Premier 500025 is an awesome little under sink RO system. It’s the most affordable unit on our list and although it comes with a very simple filtration process, it will certainly give you clean and healthy drinking water.

Key Features:
  • Capable of removing over 99% of contaminants
  • Produces 50 gallons a day ideal for small to medium families
  • Robust yet compact design that doesn’t take up much space

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Things we like

  • Capable of removing over 99% of contaminants
  • Produces 50 gallons a day ideal for small to medium families
  • Robust yet compact design that doesn’t take up much space
  • Installation and maintenance are straightforward
  • Comes at a highly affordable price with all parts included
  • Backed by a 3-year limited warrant

Things we don't like

  • Water wastage is a bit high
  • May make whistling sound while running

The Watts Premier 500025 is an awesome little under-sink RO system. It’s the most affordable unit on our list and although it comes with a very simple filtration process, it will certainly give you clean and healthy drinking water.

Filtration Process

This Watts Premier 500025 model consists of the classic 4-stage RO filtration process which includes 3 filter cartridges: two pre-filters and a post-filter plus the main heart of the system which is the RO membrane.

Stage 1 comprises a sediment pre-filter which deals with the larger particles and sediments like sand, rust, and dust reducing them down to 5 microns.

Stage 2 is fitted with a 5-micron carbon block pre-filter which has a plethora of tiny pores that allow water to pass through while trapping a large amount of different chemical contaminants. It removes chlorine, volatile organic compounds, and chloramines which affect the color, odor, and taste of the water significantly.

The 3rd stage features the RO membrane which tackles all the remaining impurities that were not sieved by earlier stages. The very tiny 0.0001-micron pores on its surface trap up to 98% of the contaminants in the water including heavy metals, TDS, cysts, bacteria, viruses, herbicides, and many more.

Completing the filtration process in the 4th stage is a granular activated carbon (GAC) post-filter employed to provide the water with one final polishing by removing any possible taste and odor from the tank as well as any residual chlorine, leaving the water with a pleasant smell and a taste of purity.

Filtration Capacity and Efficiency

The RO membrane of the Watts Premier 500025 RO system has the capability to produce 50 gallons of pure water a day which should be able to cover an entire family of 4.

The system generates 4 gallons of wastewater for every gallon of pure water it produces and again like most of the other Watts Premier 4-stage systems, this ratio is a little on the high end compared to the average ratio of 3:1 seen in many standards under sink RO systems.

Installation and Maintenance

Having a simple compact design, the installation process of this Watts Premier model is rather easy provided you follow the instructions properly. All the necessary parts needed to set it up are provided and you just require basic tools to complete the process.

Maintenance is equally a breeze as it’s only the three filters that need changing periodically. The two pre-filters require replacing every 6 months and the post-filter every 12 months. The RO membrane can last 2 to 5 years before requiring changing.

Are there any downsides? Well, we couldn’t find any major setbacks other than that the system seems to make a continuous whistling sound due to the small hole it has at the base of its dispensing spigot.

All in all, the Watts Premier 500025 model will be appealing to anyone looking for a standard RO system that delivers a good level of performance with ease. The best part is that it’s so cost-effective which is another key reason we love it.

Quick Access: Product Overview | Performance & Efficiency | Price & Rating

Historical Price Chart

This is one-year-history price chart of the Watts Premier 4SV 500025 Reverse Osmosis System.

Note: This price chart is provided for reference purpose only.

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Watts Premier 4SV 500025 Reverse Osmosis System
Watts Premier 4SV 500025 Reverse Osmosis System
Watts Premier 4SV 500025 Reverse Osmosis System
Watts Premier 4SV 500025 Reverse Osmosis System
Watts Premier 4SV 500025 Reverse Osmosis System
Watts Premier 4SV 500025 Reverse Osmosis System

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