REVERSE OSMOSIS TANK STORAGE CAPACITY OF 2.8 GALLONS. We have years of experience crafting our solutions for specific water sources in California. Our whole house water systems is designed to give you the best water quality from every faucet in your home. Setting ourselves apart from the competition, we use a three stage water system to clean, soften, and purify your water. A whole house filter, softener, and a reverse osmosis system.