How to ensure the water is perfectly pure and clean

As discussed in a previous blog, the absolute purity of the water used whilst cleaning with the reach-and-wash method is imperative. Even the slightest amount of pollution (or ions) in the water will leave residue on the glass.

What are ions? Ions are minerals and salts found naturally in water. These ions are good for us. Essential minerals and salts are replenished when we drink water.

But they’re not good for ensuring pure, clean water.

Simply put, a deionising unit replaces the ions in water with hydrogen or hydroxyl. When you combine hydrogen and hydroxyl you form pure H2O, water!

So, how is the purity of the water guaranteed?

As (also) previously discussed, normal tap-water is pumped through a large pressure vessel filled with deionising resin. This process deionises the water, or to put it another way, “scrubs” the water clean.

Eventually, though, the deionising resin loses its purifying properties. And like home water filters, have to be regularly replaced.

How is the quality or purity of the water monitored?

A TDS (Total Dissolved Solids) meter is used. This meter examines the water and gives incredibly precise readings. It detects the number of ions in the liquid.

To ensure perfect results every clean, a good window cleaning company insists that the water is monitored daily and that the deionising resin is replaced regularly.

The TDS reading one requires for ensuring perfect window cleaning results is 000. This is the standard measurement for Manchester Window Cleaners.

Below are three readings.

The first is the measurement of regular Manchester tap-water: 086

The second is measured after the water has been home-filtered using a Brita water filter: 054
And finally, this measurement was taken from the deionised water we use to clean windows: 000
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