This question is perfect for window cleaners.
There is no one right answer. There are many variables. You can control some, but others are beyond your control.
The consumable deionizing resin is used to purify water in Window Cleaning systems. It can be used in a 4-stage RO/DI filter or as a standalone method to purify water. (For more information, please see our article Types Of Filtration, RO/DI only span>
There are many factors that will impact how long resin lasts before it stops purifying enough water. But, there are some key factors that can impact the resin’s longevity.
Dimension of DI vessel (volume resin).
Simply put, the bigger the vessel, the less resin you need to change it. There are many sizes available, including the 11L or 25L. A bag of 25L will allow you to refill twice as often as the 11 Litre. HydroPower distributes water evenly throughout the resin, making it a durable and long-lasting product. This allows you to make more water from the same volume.
Total dissolved substances from the input water
Tap water can be divided into two categories: hard and soft. It isn’t as easy as it sounds. The UK tap water TDS readings are between 30ppm to 500ppm (parts/million). This scale can help you determine how long your window cleaner resin will last. The TDS Meter will take a reading directly from your tap. This will help you determine what type of filter to use. Soft water is water that’s below 150ppm. Anything higher will be considered hard water. Soft water can last several months before resin changes occur. However, resin can be passed in as little as one day with hard water.
Water usage per day
The water purification rate is not a factor that can affect the life expectancy of the resin. One operator using 650 litres per day will require more frequent water changes than the one who uses 300 litres.
Only trial and error can determine how long your resin will last. It is important to keep track of how much water you consume each day and the size filter system that you use. You won’t get an exact length because the TDS readings of tap water can fluctuate over time. There will be seasonal changes. To help your budget, it is important to track the resin’s lifetime.