On Tap is the best! Installation is fast - pricing is beyond reasonable and when it's time to change a filter - they remind me and out they come! Fabulous - I recommend to all families for great water! They know what they are doing and fast!

- Happy Customer

Quench Your Thirst With Pure Filtered Water with On Tap Water Systems of Southern California

Let Us Install a reverse osmosis system in your Orange County or Los Angeles County, CA area home

Water filtration systems are an affordable and environmentally friendly option if you want access to crisp, clean water each day. You can have pure filtered water in your own home or business with On Tap Water Systems of Southern California. We specialize in residential and commercial water filtration system installations and rentals. We've been in the industry since the 1970s, and our family owned business has provided water filtration installations for over 35 years.
We're located in Lake Forest, CA and serve the Southern California area, including Los Angeles, San Bernardino, Riverside, San Diego and Orange Counties. Call now to schedule your water treatment installation, and enjoy the taste of pure filtered water today.

Install a water filtration system in your home or business

Residential water filtration systems allow you to drink purified water from your home. You'll be pleased with the quick installation process. Alkaline water filtration systems are also available, which come with huge health benefits.

Our commercial water filtration systems are stand-up models. The filters last two to three years, and we'll replace them for you when needed. Call us to schedule your water filtration service or water treatment installation.

5 reasons to choose On Tap Water Systems

If you’re ready to install a water purification system, On Tap Water Systems is your top choice. Here are a few reasons why you’ll be glad you chose us:

  1. No contracts: Join our month-to-month purified water tank rental system for only $21 per month. Feel free to cancel whenever you want.
  2. Free maintenance: This includes yearly filter replacements.
  3. Removal service available: If you’re moving to new location, give us at least a two-week notice to relocate your water filtration system.
  4. Affordable prices: The price includes every feature of the water filtration system, and installation is only $50.
  5. Free month of water filtration service: Refer a client to save big next month.

Call now to schedule your commercial or residential water filtration system installation in Lake Forest, CA and throughout Los Angeles County & Orange County, CA and surrounding Southern California areas.


  • No Contracts
  • No Bottles or Bottle Storages
  • No Heavy Lifting