Osmosis Water Filter | Four Stage Purification | RO-350

The RO-350 gets the job one as it kills up to 99.999% of bacteria, cysts, and viruses. It’s perfect for those on a budget as it gives you a water taste similar to that of Supermarket Brand Purified Water. Not only does it  remove bacteria from your family’s drinking water, but it also filters out sediment, chlorine, chloramine, chemicals, cysts, colloidal particles, and has enhanced removal of lead. At an output of 24 Gallons Per Day, it is ideal for small rental apartment units or homes with three or less members. The System Uses All WQA and FDA Certified components, and is engineered to remove the widest spectrum of contaminants of any reverse osmosis system, due to its enhanced filtration, such as:

  • Arsenic
  • Asbestos
  • Barium
  • Bacteria
  • Cadmium
  • Chlorine
  • Copper
  • Cryptosporidium
  • Cysts
  • Fluoride
  • Giardia
  • Hexavalent Chromium (6)
  • Lead
  • Pesticides & Herbicides
  • Prechlorate
  • Radium 226/228
  • Selenium
  • TDS
  • Toxoplasma/Entamoeba
  • Trihalomethane (THM)
  • Turbidity
  • VOC’s


Elite Four Stage Filtration – With a Carbon Block Filter To Guarantee Odor Removal.

  • Stage 1 – Carbon Block Filter Removes Sediment, Chlorine and Other Chemicals
  • Stage 2 – Enhanced Chloramine Reduction Cartridge Also Removes Chemicals
  • Stage 3 – Enhanced Fluoride Reduction Cartridge
  • Stage 4 – Reverse Osmosis Membrane: This stage gets rid of dissolved substances including radium, lead, arsenic, and many others.

Got a question about the RO-350 or need a quote? Call 310-894-8488 to speak with a water filtration technician now!


  • Extra Strength Osmosis Water Filter – Effective in killing and filtering bacteria
  • Interceptor PAC Filter also inhibits growth of bacteria on the media
  • Leaves the beneficial minerals in the water
  • Filter Protected by Agion – Nature’s Antimicrobial, which is incorporated into many medical and hospital devices
  • Removes or reduces sediment, chlorine, chloramine, chemicals, tastes, odors, micro pharmaceuticals, lead and cysts.
  • Extremely low pressure drop – filters last up to 20 times longer than conventional filters.


  • All Components are FDA & WAQ Compliant or Certified
  • Full 3/8″ Flow From Tank-to-Faucet
  • Deluxe 3/8″ Tank Valve
  • Deluxe Inlet Valve
  • All-American Made Filters and Membrane
  • 3-Year Warranty
  • 1 GPM Flow-Rate
  • Upgraded Designer Faucet in Choice of Two Colors
  • 2.2 Gallon Tank
  • Standardized Purification Formula and Enrichment Combination, Wielding 4 Stages of Standard Purification


Manufacturer’s Warranty: 3-Year Warranty (excludes filters, membrane is pro-rated)

Installation Warranty:  Praz warrants to the original Customer that installation work performed by Praz for home water softeners for homes & houses, commercial water softeners, Industrial Water Softeners, Under Sink Water Filter Systems, and Alkaline Whole House SystemsAlkaline Drinking Water Systems and water conditioners will be free from defects in workmanship for a period of 3 years from the date of installation, subject to the terms and conditions contained in this warranty document. Praz will perform the installation services in a professional manner and in substantial conformance with the manufacturer’s installation instructions.

Praz’s warranty is limited to correction of any defective workmanship at no additional cost to Customer. This warranty covers installation services provided by Praz. Please consult the product warranty provided by the manufacturer for warranty coverage of products.

This Limited Warranty does not cover any defects or damages arising from causes other than the defective performance of the installation services provided by Praz, including but not limited to Customer’s failure to observe manufacturer’s instructions with respect to the product, subsequent alterations, misuse or abuse of the Praz installed product, or other causes beyond Praz’s reasonable control.

VOIDED WARRANTY: This Limited Warranty is voided if the product is removed, repaired, re-installed or otherwise tampered with.

Read More

Why Choose Praz

A few reasons why we stand out…
Diamond Icon

Platinum Service

As a locally owned business, we take pride in every one of our customers. Flexible payment options, free in-house quotes, and frequent “check-up” calls are just few of the ways we try to maintain our relationship. When you contact Praz, you are not forwarded to a call center. All of our staff is well-trained and have had years of experience in water treatment.
Banknote Icon

Save Money

In the long run, having a four stage Osmosis Filter System in your home is considerably cheaper than exclusively buying bottled water. The average American Household spends $100 per person a year on bottled water. When storage, transportation, and refrigeration costs are factored, it becomes apparent that an osmosis water filter system is an investment that pays itself out throughout its life cycle.
Chemistry Icon

Best Taste

The RO-350 offers four stages of purification, more than enough to get rid of 99% of harmful contaminants. Treatment plants use chlorine to get rid of bacteria, parasites, viruses, and other harmful microorganisms before drinking water is distributed to your home. Unfortunately, this can leave a sulfuric or chlorine type taste. With Micron GAC Carbon Filter implementation, the RO-350 effectively gets rid of this taste.

Lifetime Warranty

Included on Parts & Installation.
Discount Icon

10% Discount

For new customers, Limited time only.
Certificate Icon

Top Quality

Modern Technology

What do people think about us on Yelp

Quote Icon
Bought a water softener system a week ago. Their systems are really powerful and efficient,. All the other companies I spoke to seemed to not be sure on my exact water requirements but wanted to push for an installation anyway.

View on Yelp

Quote Icon
I haven’t actually purchased anything from Praz. I’m writing this to give a review on how knowledgeable Praz’s manager was regarding water purification. I’m a prospective customer and he spent almost 30 minutes talking to me on the phone to teach me about mineral reduction in RO filters, pH enrichment in alkaline filters, etc. Once I’ve completed my research on what I want to purchase, I am for sure going to Praz because of his knowledge, patience, and friendliness.

View on Yelp

Quote Icon
We’ve been with this company for many years and have always had great service and great tasting water. They do tend to call at random times of the evening to remind you about changing your water filter but they always show up on time and do their thing. I never understood how people could live without a water system.

View on Yelp

Why Choose Praz

Let Us Help to Find The Water Solutions You Deserve.
Commercial Water Filtration in a CUP