Residential Reverse Osmosis Filtration Sytems

Reverse osmosis is considered one of the very best method for purifying water. Reverse osmosis water purification is a water treatment process whereby virtually all particles, contaminants, and even dissolved material, such as sodium, chloride, fluoride, calcium carbonate, calcium sulfate, and many others, may be separated from water. The reverse osmosis process forces the water through an ultra-fine semi-permeable membrane under high pressure. The water diffuses through the membrane and the dissolved salts remain behind on the surface of the membrane. Water that makes it through the membrane is considered completely pure, while water that does not make it through, is sent through a drainage tube and is rendered impure.

Countertop / Portable Reverse Osmosis Water Purification System
Great for home, office, RV, hotel, and lab.
Compare At: $169.00
Your Price: $159.00
Thunder 1000C Reverse Osmosis / Ultrafiltration System With GAC Cartridge
Compare At: $349.95
Your Price: $239.95
Thunder 1000CP Reverse Osmosis / Ultrafiltration System With GAC Cartridge & Electric Pressure Pump
Compare At: $499.95
Your Price: $379.95
Thunder 1000M Reverse Osmosis / Ultrafiltration System With Multi-Stage Cartridge
Compare At: $379.95
Your Price: $269.95
Thunder 1000MP Reverse Osmosis / Ultrafiltration System With Multi-Stage Cartridge & Electric Pressure Pump
Compare At: $549.95
Your Price: $389.95
Thunder 2000C Reverse Osmosis / Ultrafiltration System With Post-Tank UF & GAC Cartridge
Compare At: $379.95
Your Price: $269.95
Thunder 2000CP Reverse Osmosis / Ultrafiltration System With Post-Tank UF, GAC Cartridge, & Electric Pressure Pump
Compare At: $549.95
Your Price: $399.95
Thunder 2000M Reverse Osmosis / Ultrafiltration System With Post-Tank UF & Multi-Stage Cartridge
Compare At: $409.95
Your Price: $299.95
Thunder 2000MP Reverse Osmosis / Ultrafiltration System With Post-Tank UF, Multi-Stage Cartridge, & Electric Pressure Pump
Compare At: $569.95
Your Price: $449.95
Thunder 3000C Reverse Osmosis / Ultrafiltration System With UV Sterilizer & GAC Cartridge
Compare At: $499.95
Your Price: $379.95
Thunder 3000CP Reverse Osmosis / Ultrafiltration System With UV Sterilizer, GAC Cartridge, & Electric Pressure Pump
Compare At: $689.95
Your Price: $549.95
Thunder 3000M Reverse Osmosis / Ultrafiltration System With UV Sterilizer & Multi-Stage Cartridge
Compare At: $539.95
Your Price: $399.95
Thunder 3000MP Reverse Osmosis / Ultrafiltration System With UV Sterilizer, Multi-Stage Cartridge, & Electric Pressure Pump
Compare At: $719.95
Your Price: $579.95
Thunder 4000C Reverse Osmosis / Ultrafiltration System With UV Sterilizer, Post-Tank UF, & GAC Cartridge
Compare At: $529.95
Your Price: $409.95
Thunder 4000CP Reverse Osmosis / Ultrafiltration System With UV Sterilizer, Post-Tank UF, GAC Cartridge, & Electric Pressure Pump
Compare At: $719.95
Your Price: $599.95
Thunder 4000MP Reverse Osmosis / Ultrafiltration System With UV Sterilizer, Post-Tank UF, Multi-Stage Cartridge, & Electric Pressure Pump
Compare At: $759.95
Your Price: $629.95
Natural Alkalizer, Ionizer, Mineralizer, & Oxidation Cartridge Add-On for RO Systems
Compare At: $67.00
Your Price: $57.00
Commercial Reverse Osmosis Systems




Not All Water Filter Systems Are Created Equal!


Crystal Quest® water filters remove hundreds of contaminants and LAST A LONG TIME. The unique high capacity and multi-stage design means no more over-priced and less effective water filters with replacement filter cartridges that have to be replaced every 100 to 500 gallons!

Pure Water Essentials offers Crystal Quest® water filtration products because Crystal Quest utilizes the latest technologies in the water industry coupled with 30 years of manufacturing expertise to provide you with high capacity, the most effective, healthiest and great-tasting water conveniently and at the most affordable price. Crystal Quest products are attractive, easy to install and use.

Crystal Quest Water Filter Reviews


The CRYSTAL QUEST® Pitcher Water Filter and Shower Filter were awarded "Best Buys" in the August 2006 issue of Consumers Digest magazine.

The CRYSTAL QUEST® Pitcher Water Filter, Shower Filters, Faucet Mount Water Filters, Countertop Plus Water Filter, Reverse Osmosis Filters, Refrigerator Filters, and Travel Water Filters have been recommended in "The Drinking Water Book - How to Eliminate Harmful Toxins From Your Water" (second edition 2006) by Colin Ingram, on pages 118, 119, 120, 121, 122, 134 and 160.