Reverse Osmosis Buyers Guide 2023

Advanced reverse osmosis technology for clean water in Dripping Springs, TX

Find The RO Replacements For Your System

Table Of Contents

  1. What Do I Need To Know Before Purchasing A Reverse Osmosis System?
  2. What Size Of RO System Do I Need? Understanding RO Membrane GPD Rating.
  3. Where Can I Buy A Quality Reverse Osmosis System Or Replacement Filters And Membranes?
  4. What To Look For When Purchasing A Reverse Osmosis Drinking Water System?

If you’re thinking about getting a reverse osmosis water filtration system, you may have some questions. Don’t worry. We’ve got you covered! 

Let’s talk about things like choosing between air-gap & non-air gap RO faucets, connecting your reverse osmosis system to a refrigerator & finding the perfect system size for your home or application. 

Just ask away!

1. What Do I Need To Know Before Purchasing A Reverse Osmosis System?

Water Treatment Showdown: Water Softener vs. Water Filter

So, you have made the decision to research reverse osmosis systems prior to making a purchase. Excellent. Here are seven additional factors to take into account:

  • Do I need to buy a faucet? 

Reverse osmosis (RO) systems require a dedicated faucet for dispensing treated water. Were you aware that it’s possible to enhance your RO faucet to align with the color, finish & style of your current kitchen sink fixtures?

  • Do you want an air-gap or non-air-gap faucet?

Non-air gap faucets do not incorporate an “air gap” in the drain line to prevent the backflow of drain water into the system. Nevertheless, non-air gap faucets offer a more straightforward installation process & produce less noise. 

The inclusion of a check valve in the drain line ensures safe prevention of backflow from the drain, thus making non-air gap faucets the most prevalent choice.

  • How many stages of filtration should an RO system have? 

Reverse osmosis (RO) systems usually come in 3, 4, or 5 stages of filtration. For most applications, opt for at least 4 stages. Considering a system with additional pre-filtration (5 stages) may be advisable for healthy water or areas with high sediment levels. 

RO systems with four to five stages offer sufficient filtration for the majority of applications.

  • What about water hardness? 

If the incoming water has a hardness level above 7 grains per gallon (gpg), this will not be effective. It’s important to note that an RO system is not a water softener. 

However, in cases where the water hardness exceeds 7 gpg, using water softener pretreatment can significantly prolong the lifespan of the RO system & membrane, although it is not mandatory.

  • Does an RO system waste water? 

Just like we utilize water for washing dishes, clothes, or vehicles, RO technology uses water to cleanse the RO membranes during the water processing phase. Throughout the filtration process, RO systems typically consume more water compared to the amount of filtered water they produce. 

Nonetheless, as soon as the storage tank reaches its capacity, the system automatically shuts down, preventing any further water wastage. It’s worth noting that specific systems exhibit higher water efficiency compared to others.

  • How much water can a system produce?

Anticipate a production rate of 50% to 75% of the system’s GPD (gallons per day) rating. Although it is uncommon for individuals to consume 50+ gallons of drinking water daily, the “50 GPD rating” refers to the speed at which an RO system generates drinking water, producing around one gallon per hour under a standard water pressure of approximately 60 psi. 

Consequently, a system with a 50 GPD rating will sufficiently meet the production needs of an average household & entail only a marginal increase in cost compared to a lower GDP-rated system. 

  • Would you like RO water for your ice maker? 

Enhance your ice maker with a refrigerator ice maker adapter kit for convenient access to RO water. There is no need to purchase an additional refrigerator filter.

What’s our most popular RO system?

2. What Size Of RO System Do I Need? Understanding RO Membrane GPD rating?

Reverse Osmosis benefits
Reverse osmosis, water cleaning filter, exhibition stand. Filtration system, water purification

A Reverse Osmosis system typically operates under water pressure ranging from 40 to 100 psi, resulting in daily production of 10 to 75 gallons (45-340 Liters) for point-of-use systems. It is important to note that the actual production rate of a system is typically 50% to 75% of its GPD rating.

Key Points on RO GPD Ratings:

  • Reverse osmosis (RO) systems are evaluated based on their daily water production capacity, measured in gallons per day (GPD).
  • GPD ratings are determined through tests conducted under optimal water conditions, including specific temperatures & contaminant levels, to achieve the highest production rating.
  • It’s important to note that colder water can decrease the production rate by up to 50 percent.
  • Over time, RO membranes can become clogged with contaminants, leading to a decrease in production. Regular replacement of filters & membranes is necessary to maintain optimal performance.
  • The filters & RO membrane may exhaust more quickly based on the specific types & levels of contaminants present.
  • Typically, there is only a minimal price difference between lower production rate RO systems (24-36 GPD) & higher production rate RO systems (50-75 GPD).

For residential use, we highly recommend a 50 GPD-rated RO system. The higher GPD system offers a marginal price difference compared to a lower-production rated system while ensuring ample production during cold water temperatures in winter months & as the membrane nears its end of life (typically 24 months).

3. Where Can I Buy A Quality Reverse Osmosis System Or Replacement Filters and Membranes?

Water Softener Repair

At Lone Star Water Services, we offer a wide range of replacement filters & membranes for leading brands of reverse osmosis systems. Additionally, we have a selection of new reverse osmosis systems available for purchase.

Shop RO Systems

Shop Replacement RO Membranes & Filters

4. What To Look For When Purchasing A Reverse Osmosis Drinking Water System?

reverse osmosis, Reliable water purification with reverse osmosis in Dripping Springs, TX

When purchasing a reverse osmosis drinking water system, it’s essential to look for the following features:

  • Quality components such as genuine US-made filters & membranes. 
  • A Certification of Performance (COP) that proves the system has been tested & meets NSF/ANSI standards.
  • Full manufacturer’s warranty coverage for parts & labor in addition to a comprehensive customer service department.
  • A system that is easy to install & maintain, including clear instructions on how to change out filters/membranes. 
  • An integrated shut-off valve & non-air gap faucet setup ensures safe prevention of backflow from the drain, thus making non-air gap faucets the most popular & efficient choice.
  • A high-efficiency membrane that is matched to the quality of your incoming water.

Why Buy From Lone Star Water Services?

RO system

Lone Star Water Services is dedicated to maintaining a position of leadership in the water filtration industry through continuous innovation. We provide an extensive range of high-quality water filtration products from renowned brands. 

Additionally, we take pride in offering one of the most extensive online inventories of membranes, filters & replacement parts to ensure optimal performance & longevity of your system.

Here are several reasons why you can shop with confidence at Lone Star Water Services:

  • Extensive experience in water filtration & purification since 2003
  • Thorough research to offer you the finest options available
  • Competitive pricing on high-quality systems
  • Regular filter replacement reminder emails to assist in system maintenance
  • A wide range of RO systems, replacement parts & membranes are available online.
  • Exceptional customer support


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