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What are total dissolved solids?

“Dissolved solids” refer to any minerals, salts, metals, cations or anions dissolved in water. This includes anything present in water other than the pure water (H20) molecule and suspended solids. So when we refer to TDS, we are measuring your water quality or how hard (or soft) your water is. Your TDS and how often you plan on using your system (daily, frequently, infrequently, etc.) are two of the most important factors in choosing a waterfed purification system.

How do total dissolved solids apply to window cleaning?

Simply put, the lower the TDS, the lower your purification system cost can be.

What is the most popular purification system sold?

Our line of XERO Pure Systems are routinely our best selling systems for many reasons. They just work, are simple to operate, and cheap to maintain. They can handle the hardest of water and are an affordable pure water system for a residential or commercial cleaning business. We sell hundreds of these units each year and are 100% confident in their ability. You're also covered by a killer warranty. Check out our post on Ten+ Reasons To Buy A XERO Pure.

However, there are many different purification setups available and we'd be happy to chat with you about them as well! Maybe a multi-stage system with a pump such as the IPC HydroCart would be a better option for you. There are even systems that allow you to make and transport your own pure water, such as the Tucker Fill N Go System.

What do you recommend if my TDS is under 100?

A DI tank will be a cost-effective method of purification. Shop our selection of Single-Stage systems that are high-quality and reliable options for those working in areas with soft water.

If you are looking for a complete option, we have that available too! We recommend looking at the XERO DI Tank Package. It comes with a 1/2 Cubic Foot DI Tank and the XERO pole of your choice. The Unger HydroPower Ultra Package is another complete option for those with softer water. You can choose your Unger HydroPower system and pair it with a premium Unger water fed pole.

What do you recommend if my TDS is over 100?

A DI tank will NOT be a cost-effective method of purification. You need a Multistage System.

Here's an example:

Let's say your water is 222 ppm and you are using a standard DI tank. You would only expect to produce around 700 gallons of work for 23 working hours at a cost of $99 per resin refill. Now, let's compare to that if you were using a multi-stage system like the XERO Pure. You can expect to produce about 5,500 gallons or work for 184 hours before spending $59 to refill the resin. So to produce the same 5,500 gallons through a DI tank only would cost you roughly $800. See where the savings compounds over time?

Want to do more research? Check out our Understanding Purification Guide or reach out to our Experts and we'd be happy to go as in-depth as you want!

Best For Hard Water (TDS Above 100)

  • XERO Pure

    If space isn't an issue but you're sticking to a budget, the XERO Pure is a great choice. It's an affordable, easy-to-use, three-stage purification system that is great for beginners, residential, or commercial window cleaners. It can handle soft or hard water and provides reliable pressure at 2-3 stories.

  • XERO Pure ATOM

    If you are tight on space, consider the ATOM! This works exactly the same as the XERO Pure but the smaller size is convenient for smaller work vehicles. The ATOM has three stages of filtration and non-proprietary filters. Super user-friendly and reliable.

  • XERO Pure MAX

    Need to run two poles? Want something you won't outgrow? This is for you. The dual ROs on this unit produce 1 gallon per minute allowing you to work without a pump on high windows. Easily run two poles at once for those big jobs. This unit can handle the hardest of water and help you tackle up to 4-5 stories with ease.

  • XERO Pure PLUS

    With heightened user efficiency, the XERO Pure PLUS is durable, and easy to operate. With four stages of filtration this is the system to choose if you need to pack more of a punch than the XERO Pure. This is also a great option for city pure water users to tackle the influx of chloramines in city water. The added chloramine filter to this model helps the overall longevity of the system's RO membrane so you can produce pure water whenever you need!

  • XERO Pure MAX Plus

    Hard water is an issue of the past, and pure water is your future with the state-of-the-art XERO Pure MAX Plus. You will be able to tackle any job you encounter with the option of running two poles at once without needing to add a pump! With an added chloramine and sediment filter to protect the RO Membranes, this machine will last you for years to come! This machine is a great option when choosing to go entirely water fed.

  • XERO Triple Pure

    For the pure water user that needs three gallons of pure water a minute, and operation of three water fed poles for the toughest jobs, XERO has brought you the XERO Triple Pure. Hard water is no match for triple RO membranes which provide you with consistent, heavy flow. Built with the highest quality of materials, XERO has designed and built this machine to LAST.

Best For Soft Water (TDS Below 100)

  • XERO Double DI Cart

    This DI Cart is designed for soft water areas. It features a sturdy frame, non-proprietary filter changes and two 20 Inch DI Housings. Upon delivery, this DI Cart is fully assembled and filled with resin, ready to go.

  • XERO DI Tank

    XERO DI Tanks are great for soft water areas. Once your TDS meter starts reading too high, just replace the DI Resin. It's easy to change out the old resin too. If you work out of a smaller vehicle and only need occasional pure water, this is it!

Talk with a Water Fed Pole
& Purification Expert

Let us know how we can help you choose the best purification system for you!

  • Call 862-266-0677

    We take calls 24/7. That means you can call us on the weekend or holidays and someone can assist.

  • Text 862-312-2026

    Maybe you prefer to text us? No problem, we make it simple! Let's chat! Use this number to text us.

  • Email us

    We are always available by email too! Send us a message at and we'll get back to you as soon as we can!

  • Live Chat

    See the "Chat" button in the lower right hand corner of the screen? Use this option to chat with someone at WCR who can assist you.

  • Facebook Messenger

    We can be social too! We are highly responsive to all messages that come into our Facebook page (or Instagram) so please feel free to hit us up any time!

  • Schedule a Consultation

    We would be happy to help you select the best products for your business and budget. Schedule a day and time with one of our product experts to talk about your needs!

Don't Forget You
Can Lease A System!

We know quality purification systems are not cheap. Leasing is a great way to get the system you need while making small, monthly, manageable payments!

Whether you are a solo operator or have multiple crews we can help you choose the best purification system for your needs and budget. We also specialize in helping customers upgrade their current waterfed pole purification system set up. One of the options to do this if financing or leasing.

Leasing a new purification system does not have to be scary! There is no risk, upfront costs, or hassle. It takes seconds to apply and most of the time you will receive an answer the same day. Learn more or apply now!

Apply Now