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Global Water RO-505 Reverse Osmosis System Review

When it comes to purifying water, a reverse osmosis system is the first thing that comes to mind, but most people believe that the best reverse osmosis systems are beyond the average customer’s budget.

Global Water RO-505 Reverse Osmosis System Review

If you are one of them, your opinion is going to change after reading this “Global water RO-505 System Review “.  At the very least, you will realize this reverse osmosis system is not going to cost too much.


Global Water RO-505 is among the top-rated systems on the market, with nearly 400 real customer positive reviews at the time of writing. Many reviews note the customer service is the best they have ever experienced. 

These days Tap water is causing many health issues due to contaminants. This is why so many people spend a lot of money buying bottled water, polluting the planet with plastic bottles. Not to mention that water from plastic bottles can be contaminated with BPA’s.

If you are concerned about your health and want to avoid bottled water, then a system like the Global water RO-505 will be ideal, it removes 99% of contaminants from tap water, ensuring we have fresh purified drinkable water.

The main reason for its above-average performance is the NSF certified filters. The filters are of highest-quality so you will not get anything other than purified and contaminant-free water. Obviously, you need more than that from the purification system.

The color-coded tubings make this system so simple to install, with basic tools you can install it within half an hour, at most it should not take more than an hour for installation. Provided you have all the tools of course.


Global Water RO-505 5-Stage Reverse Osmosis System Water Quality Filter

1. Global Water RO-505 5-Stage Reverse Osmosis System Water Quality Filter

24 Hour USA Tech Support – Plus Extra Set of 4 Filters for Free

  • A key feature of the Global Water RO-505 5-Stage Reverse Osmosis System is its high quality Quick Connect fittings.
  • These fittings make installation quick and easy, by eliminating the need to solder or glue connections together.

Global Water RO-505 Highlighted Features

Filtration Process

Global water RO-505 system uses a 5-stage filtration process. This system also includes a sediment filter, which removes dirt particles from your water before it enters the reverse osmosis membrane, extending the life of your membrane and reducing maintenance costs. The filtration process is identical to other more expensive 5-stage under sink reverse osmosis systems. The Global Water RO-505 5-Stage Reverse Osmosis System features a TDS meter that measures Total Dissolved Solids (TDS).

The filtration process reduces the Total Dissolved Solids (TDS) and removes up to 99% of contaminants from feed water. The filtration process of RO-505 is highly efficient and gives you a constant supply of clean water that is much healthier for you than tap water. 

During the purification of the feed water, it removes more than 1000 different contaminants. It is not possible to quote all here but most prominently chlorine, fluoride, lead, and bacteria are included in these contaminants.


Global RO-505 has high-quality filters. The quality of filters makes its performance competitive. The filters have a fairly industry-standard lifespan.

The filter replacement duration varies due to a number of factors. It is recommended the filters are replaced every 6 to 12 months, it all depends on the quality of feed water. If your water is more contaminated than others you have to change it often. Obviously, the level of use will also determine how often filters are changed, some owners have said they can go 3 years without needing to change the filters, but we do not recommend this. 

One really nice bonus of this system is that it comes with 4 Spare replacement filters. Moreover, the replacement filters of Global water RO-505 are inexpensive. So you really will not be spending a lot of money maintaining your fiters. 

Fresh Purified Water

When the Tap water goes through the Global Water RO-505 filtration process, it will have removed up to  1000+ different harmful chemicals, solids, and other contaminants.

Leaving you with nothing but clean fresh

Purified water

Obviously, after removing all the unwanted contaminants only Fresh tasting pure water comes as an output.

Customer Support

Global Water RO-505 has built a reputation of having the best customer service in the industry. With a highly skilled and responsive customer support team. So, if an unlikely problem does arise during installation or operation, you can contact them without hesitation. The average response time customers report is within 4 hours through email.

However, if you have an urgent issue you can call them during business hours and speak direct to one of their support team members.

A nice touch is that after assisting you in your specified problem over the phone, they follow-up via email and telephone to make sure you are completely satisfied with their product.

Automatic Shut-off

Of course, there is an automatic shut-off valve incorporated into the system. It is almost an industry standard now that reverse osmosis filters have a shut-off valve, helping to prevent excessive water wastage. 

Automatic shut-off valves stop the filtration when the storage tank reaches the limit of 65% and ready to provide you with an instant filtered water supply.

The Negatives

In terms of performance, the Global water RO-505 system can compete with many TOP RO Water systems. But there are some negatives points associated with this under sink osmosis system.

Instructional Manual

The installation of this under sink RO water system is a piece of cake. The installation can be done within few minutes, if you are already used to using basic plumbing tools. 

But if you are new to the reverse osmosis systems you will obviously follow the instruction manual to set up. And one complaint from buyers is the instruction manual of the Global Water RO-505 water system is vague and poorly written. Thankfully they have excellent customer care that will answer any questions you have regarding the install.

But, if you are good at critical thinking and solving puzzles it will not be an issue for you. If you really feel it is too technical, it is recommended to have professional assistance if you don’t want to see your home flooded. Once installed you will not need any more assistance from professionals, because the only thing you will need to do is change filters, and the filter changes are really simple. 

Water Efficiency

Water Efficiency is measured by the water waste ratio.

Global water RO-505 wastes around 5-6 gallons for producing 1 gallon of purified water. Unfortunately, this water waste ratio is more than the other efficient RO water systems like iSpring RCC7 which wastes only 3 gallons per gallon produced. Although, it is not as bad as many RO water systems waste 24 Gallons of water, which increases the total cost of ownership.

By the way, 5-6 gallons is still a great loss. Instead of wasting this water, you can use it in different activities. It all depends on your approach. 

You can keep the wastewater for               

  • Cleaning dishes
  • Car wash
  • Gardening 
  • Mopping Floors



  • Produce 50 Gallons per day
  • Easy installation
  • Automatic Shut-off valve
  • 4 Replacment filters in the package
  • Durable NSF Filters
  • Noiseless operation
  • Lead free tank and faucet
  • Removes 99% Contaminants


  • Water waste ratio more than other Efficient System
  • Does not work efficiently with more contaminated water like sea water
  • Does not have advance features like Re-mineralization or UV light

Final Thoughts

Global Water RO-505 has a water waste ratio higher than the other efficient RO water systems which is a bit of a drawback. 

It is the only 5-stage reverse osmosis system, that is able to efficiently filter well-sourced water. The effectiveness of this value for money water RO filter, it is hard to fault the performance of this RO water system. 

The manufacturer did a great job of providing value to its customer. The whole system is pre-assembled you just need to give it a few minutes for installation. The 4 extra sets of replacement filters inside the box is another great bonus.

The High-quality NSF Filters are removing 99% of contaminants from the Tap water. The water produced by this RO system is completely pure and contaminant-free water. And obviously, a Lead-free faucet is available inside the box to deliver you filtered water.

All of its Pros clearly outrank the Cons. But if still you are concerned with the water waste ratio, have a look at an almost identical system with a better water-waste ratio “Express water RO5DX“.

But if you are creative enough and know how to use wastewater, it will not be your deal-breaker.

Summing it all up, the Global Water RO-505 is highly recommended because of its great value for money,  second to none customer support, fresh-tasting water, Ease of installation, and durable filters.

We hope, now you have all the essential knowledge about this Water filtration system.

Do you have anything more to share or ask?  Let us know!

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