How do we make our water pure.
We have invested a lot of time and money into the system above. which consist of the following.
5 Micron Filter: The sediment/particulate cartridge. This is just a polypropylene tube, but it is capable of removing any “insoluble” particles of 5 microns or above. This is 5 thousandths of a millimetre. It basically removes visible dirt and sediment.
Carbon Filter: So a second filtering stage is used to remove the chlorine, by passing the water through an activated carbon charcoal media via a cartridge. It is the same size, shape and appearance as the first sediment cartridge and usually is found situated right next to the first sediment cartridge as well.
Ro Filter: RO or Reverse Osmosis process. This basically is a very, very fine filter membrane. It is referred to as an “RO membrane” or sometimes “RO filter”. Let’s look at just how fine this filter is. Remember the 5 μm (5 micron) sediment filter which has “pores” in the filter of 5 thousandths of a millimetre? Well the RO membrane has “pores” that are 1 Ten thousandths of 1 micron in size. This is so small that the single “atoms” of the minerals dissolved in the water cannot pass through. BUT, and this is a very big but, the pores are large enough for the much smaller water molecules to pass through. The water can now be removed from the minerals, but there is a very important factor involved which we need to appreciate.
Di Filter: An up flow mixed bed resin column. This is a strengthened plastic or grp cylinder that normally stands upright and is filled with an ion-exchange resin that removes all “charged” (ionic) substances from the water creating a very pure water product. The product water will often be holding less than 1ppm of the ionic minerals (mainly calcium) and will always provide excellent cleaning spot free results.This is often referred to as a DI system or Demin (Demineralisation) system. It relies on the stored resin alone to purify the water and is mainly used in areas of low mineral content water.
The Cleaning process.
The cleaning process is a two stage procedure.
Stage 1 The Wash: The agitation of the dirt with the water to create a solution and suspension of insoluble dirt in water. This breaks the dried solids from the surface of the glass and frames and loosens them for mobility.
Stage 2 The Rinse. The fresh clean and TDS free water is sprayed onto the mobile debris and gravity helps wash downwards off the window.
Before we can start on your window, we give your job a little thought. We extend the hoses from the van to the furthest part of your building, so we are working while walking back towards the van. This is best because the delivery hose becomes quite a nuisance and heavy if we are dragging it with us.
It is not always the case, but the dirty water from the upper windows can run down the building and dirty the lower windows, so it is normal practise we start with the top windows or higher windows. This means using the larger poles at the start of the jobs. As the brush head is a distance away and we cannot see closely the effects of the brush bristles, we have to rely on the technique to do the work thoroughly.
1. Start with the top of the frame, moving side to side.
2. Then move down the side frames on each side, up and down several times
3. Onto the glass LHS and move zig zags up and down and across to the RHS then
4. back again
5. Drop down to the base of the frame and move left to right, brushing the lower glass
6. and horizontal frame
The agitation has now covered the entire surface area of your window frame and glass.
The first time we clean your window or after it’s been left a few months, the level of dirt on the frame will be high enough for us to clean the frame first as just described. But if this is a regular clean and the frames are satisfyingly clean, we need only confine the agitation to your glass alone. Either way, we pay special attention to the corners of the window. It is a common complaint that when dry, the corners seem untouched and show a misting of dirt.
The majority of dirt has already been removed at this stage because of the constant spraying during the agitation. Dirty water will already be running down your walls of your building, but this still leaves contaminated water on the glass in droplets. The rinsing replaces these droplets through dilation with very low TDS water that does not leave any spots or streaks.
When we rinse, the brush head will be held away from the window (around 8 – 12 inches) and the head is moved from left to right a couple of inches between lines.
To confine rinsing to the glass, unless the frames are particularly bad. We keep the pressure down on rinsing as too much splashing about sends contaminated water droplets everywhere, even above the brush head.
It is very common that after a first clean with purified water, you may experience white streaks or spotting on the glass. This can happen? Because your window has been cleaned, for years sometimes, using a detergent of some kind, with a squeegee and even though it rains on the glass, an amount of chemical is drawn by capillary force into the window seals. As we add purified water, this too is drawn in and dissolves some soap. This soap solution stays there and sometimes after we have left and it has reduced a little by evaporation, it may run down the glass and dry, forming a streak. This will sometimes happen even if detergent hasn’t been used, but not as badly as a soaped window. The only solution is to call us and we will rewash the affected area only and avoid. It will reduce dramatically during each wash and the worst doesn’t usually last more than 3 – 4 applications.