What Type of Pure Water Filtration Do I Need for Window Cleaning?
Two Methods to Filter Pure Water
De-Ionisation (D/I)
Single stage resin vessel used to purify water, ideal for softer water areas
Reverse Osmosis (R/O)
Multi-stage R/O Filter System, ideal for medium to hard water areas
Choosing the correct type of filtration will depend on how hard or soft the water is that is being purified, this can change dramatically from one town to the next. Â
It’s important that you choose the correct method of filtration, as getting this wrong can be a costly mistake.
When selecting the best type of water filtration for your requirements you will need to take into account the initial costs of the water filter along with any future running costs (replacing filters).
A single stage D/I resin vessel is cheaper to purchase compared to an R/O based filter system, but may end up costing far more to run over time and is only ideal for people who live/work in a soft water area.
We advise you to check the water quality from the tap where you will be filtering your water, this will allow you to make an informed decision when it comes to choosing the right type of filter system. Purchase a TDS meter to check your water quality.
Soft Water Areas
For those that have softer water (<60ppm TDS), you can benefit from a single stage resin based filter. This uses a process called deionization (D/I) where the water passes through Ion Exchange resin, which removes the total dissolved solids (known as TDS) and produces pure water at 000 ppm TDS.
What if my water quality reads 100ppm?
The higher the TDS of the water to start with, would determine how long the resin would last. For example if the water was reading 100 ppm to start with, it would not last long before the resin would be spent and no longer purifies water to the desired 000 ppm.
<004ppm is required to leave a streak free finish on the glass, making it not economically viable to purify water with just a single stage D/I process if your water quality is higher than 60ppm.
D/I Based Filter Vessels
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25LTRRESIN-2
Spectrum D/I Mixed-Bed Resin – 25 Litre Bag
Original price was: £92.65.£84.95Current price is: £84.95. ex VAT £101.94 inc VAT
Hard Water Areas
For harder water areas you would benefit from a multi stage filtration process. This process is known as reverse osmosis (R/O). Deionization is still used in this process however the water passes through a sediment and carbon pre-filters, preparing the water for the R/O membrane.
The R/O process then removes 95 to 98% of the water TDS in a cost effective way prior to the final D/I process, for example if your water TDS is 300 ppm an R/O should reduce this reading to around 6 to 15 ppm meaning the final resin process does not have to work as hard, which prolongs the time before it requires replacing.
If set up correctly this process should not cost more than £200-£250 per year on filter changing (based on someone using around 500 to 750ltrs of pure water a day).
Talk about water pressure and the effects this has on a R/O based filter system.
R/O filtration systems are rated on a GPD (gallons per day) value, the actual output of each filter system will vary depending on a number of factors, such as water pressure, water temperature and age/health of the R/O membrane.
R/O Based Filter Systems
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2000-STATIC-MANUAL-FLOOR
2,000 GPD Static Manual Pure Water R/O System – Floor Standing
£925.97 ex VAT £1,111.16 inc VAT -
2000-STATIC-AF-WALL
2,000 GPD Static AUTO FILL & FLUSH R/O Filter System – Wall Mounted
£1,543.97 ex VAT £1,852.76 inc VAT -
2000-FILTER-ONWHEELS
2,000 GPD On-Demand R/O Filter System On Wheels
£1,028.97 ex VAT £1,234.76 inc VAT -
4000-STATIC-AF-WALL
4,000 GPD Static AUTO FILL & FLUSH R/O Filter System – Wall Mounted
£1,904.47 ex VAT £2,285.36 inc VAT
How To Measure Your Water Quality or Hardness?
You can measure the water quality in your area with a TDS meter.
When dipped into water, the TDS meter will show a value of TDS (Total Disolved Solids) with a measurement of PPM (Parts Per Million), this helps identify the quality of your water.
Ultra pure water will have a reading of 000ppm TDS.
Any TDS value below 50-60ppm is classed as soft water.
Any TDS value above 60ppm we class as hard water.
How To Test Your Water Pressure?
Thinking of an R/O based filter system?
Test your water pressure!
When using an Reverse Osmosis filtration system it’s important to feed these with a decent amount of water pressure.
If you have low water pressure it will result in a slower production of pure water and will also decrease the lifespan on the R/O membrane.
We recommend a minimum of 60psi to operate our R/O filter systems effectively.
If your tap pressure is lower than 60psi we would advise a booster pump be added inline to increase the water pressure.
How To Boost Your Water Pressure?
Produce Pure Water Faster with Lower Running Costs
There are two different choices of booster pump, a mains 230v and a 12v version.
The mains 230v pumps need to be manually switched on and off at the start and end of the filling process and are either placed within the vehicle or in most cases situated between the vehicle and your water supply.
The 12v version is a van mounted unit that is operated automatically by the onboard control panel, the pump will switch on when you place the system on fill & switch off when the tank is full. The onboard 12v boosters are a great asset to those that are filling from multiple sites and want to make sure they always run the optimum pressure through their filtration system.
