[bobplum]

trawling around the you tube world came across mr perry tait,i think he contributes to lee burbridge magazine and he mentions spotting can be caused by a high flow rate,i think this happens because you are not allowing the water to cascade down

any thoughts on this

bob

[rg1]

Maybe with a high flow rate, the water splashes onto areas that you haven't cleaned and then that water drips onto the window.

Water doesn't always cascade, depends on the type of glass.

[SB Cleaning]

Maybe with a high flow rate, the water splashes onto areas that you haven't cleaned and then that water drips onto the window.

I think this.....

I usually use setting 40 out of 99

[MATT BATEMAN (OWC)]

i think this happens because you are not allowing the water to cascade down

So it's not caused by a high flow-rate then ;0)

We run pumps at full bore, no controller, and rarely get complaints about spotting. We get them, but not often. I had a complaint earlier today about two windows on a job I did recently, the last time on my work, cant remember.

[rg1]

If a high flow rate does cause spotting then there must be a very fine line between what's too much water and what's not enough.

[rg1]

i think this happens because you are not allowing the water to cascade down

So it's not caused by a high flow-rate then ;0)

We run pumps at full bore, no controller, and rarely get complaints about spotting. We get them, but not often. I had a complaint earlier today about two windows on a job I did recently, the last time on my work, cant remember.

Judging by your experiences, a high flow rate does indeed cause spotting. Although not very often..Interesting.

[MATT BATEMAN (OWC)]

I dont put that down to high flow-rate.

I would however assume that if we were to use a lower flow-rate we would probably have more complaints.

Sometimes however much you rinse you arent going to get a perfect job. Windy days are an example of just one way that can happen.

So judging by my experience, having worked at high and low flow rates I'd say "No, high flow-rate is not the cause of spotting, particularly in the instance I used as an example".

I am going back there tomorrow and will re-do the property at exactly the same flow rate. I have asked her for feedback once this is done. I will report it back to you, having not had a complaint from her in the last 3 years I'd say it was something else that caused it.

[bobplum]

i ask this question in part because yesterday i cleaned my own windows and they haven't been done for nearly 2-3 months and i used a low flow rate,40psi,well its low to me has i normally run at 50 and to be honest i dont think it was a good 40 as the tank was nearly empty and it was struggling to get a good flow out and because i use fan jets it was more like a pencil jet and they came up very good compared to last time same circumstances and i used a high flow and they spotted like hell then i saw the you tube video and just wondered if there was anything in it

[stuart mc]

I agree with matt

[Smudger]

I agree with matt

+1

we use high flow and spotting complaints are virtually non existant - the last compaint like this was due
to water TDS of 22  ( my error )

when i had a lower flow rate and pencils spotting was more of a problem - even with 0000  tds water

Darran

[ben M]

i don't know to be honest  

[p1w1]

i don't know to be honest  

i don't think anyone does really 

[ben M]

i don't know to be honest  

i don't think anyone does really 

[stuart mc]

I am 100% certain a high flow rate does not cause spotting, if you are getting spotting with a high flow it is for another reason

[DG Cleaning]

I don't use a controller and I've never had a complaint about spotting.
As long as the brush is angled downwards when rinsing I reckon it should get rid of everything.
I've turned the flow down a bit when I'm running low but I always turn up to rinse.
More water the better

[SunShineCleaning]

No it doesn't cause spotting due to the flow rate.

It's  more likely technique and splashback.

[[GQC] Tim]

Whether you use 1 litre or 10 litre per minute, the water is still pure. So the water itself can't spot. You want to get the dissolved solids down the glass as fast as possible, therefore use a high flow rate (10 lpm was an exaggeration), you'll be much faster.

However, if you rinse with the brush off, you do need to be aware of the water splashing the more you have the brush off the glass, hence it could be that you will get drops in places you don't want to, then come dribbling down the glass when they feel like it. Its usually a mistake that beginners make. Hold your brush closer to the glass, or rinse on.

[MATT BATEMAN (OWC)]

+1

[ben M]

+2

[home6442]

What sometimes happens with a high flow rate is as follows.
As you start to rinse, the dirty water that your trying to rinse off is forced above
the rinse line and is left behind to dry and spot.