Sunday, May 22, 2022

QUICK Q&A: What’s the difference between High Flow and Low Flow ULTRA-LITES?

all right so welcome to another q a this one is uh talking about the difference between the high flow and the low flow rinse bars in the ultra lights and lights and so there's a lot of information to share .

To get to the point but basically you have a flow rate at your point of source which could be out of your filter or out of your tap and what's going to happen is you've got a whole lot of hose and tube and then you've got gravity the effect of gravity which is 5 psi per .

10 feet something like that and so at the end of the day we want to be able to make sure that we've got enough velocity and volume of water coming out of a brush let me grab a brush a little prop light and ultra light okay so we've got light and ultra light so there are certain people in the world where the flow rate is particularly when .

Somebody's in the at the point of purchasing because they don't have the long journey with us along um the the pathway of the scientific development of the radial brushes and so for them at that point in their journey the flow rate is critical because they don't want a too higher .

Flow rate mostly it's people either in a drought area or people in uh uk and europe where they carry their own water and they only have 600 liters or 200 gallons you know per day with them on their site and they can't tap into the customer's water .

So so we have firstly we want a flow rate at the point of source which is maybe at least double what we want at the brush and most of the radial brushes are designed for two two liters per minute or half a gallon per minute and the reason for that is because that gives you an incredible flow it's over the top .

It's on glass and we can get the water with the radial pattern of the of the jets we can get the water into the corners and we can turn the water off when we angle the brush we can the gravity will pull more water out of the bottom of the brush less water out of the top of the brush so the top jets um turn off and so we .

Can run across the top edge without wetting above where where we've agitated whether it's the top edge of the frame or the top edge of the glass depending on how you clean the windows and how often part of me so um when somebody has a need for a low .

Flow we would reduce the flow rate from half gallon a minute to a third of a gallon a minute or two liters a minute to 1.5 liters per minute and for the for the radial light and the ultralight they both use the same rinse bars so you can interchange them between the two so anybody who's a normal reach-it .

Customer would buy what we call high-flow rinse bars which is two liters a minute and if they are a new customer and and or they're carrying water and they don't understand the radial technique and how much faster it will make you on the glass then you can buy a low flow rate and that's 1.5 liters per minute both of them work pretty much the .

Same because of the design of the brush so it's not really a challenge from a productivity point of view but there's no doubt that the more water you have on the glass in particular understanding that water doesn't go through a radial brush water stays on top of the radial brush we angle the brush and all the water runs .

To one side so if you're going down the frame you've gone through the corners and you go down the frame all the water is going here and it flushes an amazing amount of water down and that is critical if you're going to be trying to flush spider webs without having to go back and chase them down the glass like we .

Would with pencil jets so how do you get these different uh rinse parts hyphen low flow you choose them right in the web store yeah you can choose them in the web store and basically the difference is the id of the orifice orifices .

Of the jet streams so one has a bigger id than the other and so to understand that you have to understand you know flow equals pressure times resistance and so the smaller we make the hole the greater the resistance the higher the velocity now what we want is the velocity that will squirt the flow rate .

This far right yeah you don't want it to have a velocity to like create yeah yeah aerosols yeah if you put two liters a minute through a 1.5 liter a minute brush the the water will squirt that far but we only want the water to squirt this far we don't want to blast we're not pressure washing the window we don't .

Want to blast the window so if you had a low flow rate brush and the water was squirting you know 18 inches to 2 feet then you would turn the flow rate down at the tap or somewhere in your system because you don't need a low flow rate brush shouldn't be operating on a high flow rate right we've got some videos .

From modman and the oracle for that um yes uh future of cleaning yeah so forward slash future of cleaning to go and have a look at the mod man and uh oracle videos on that and so um the the objection the objective scientifically is to squirt .

The water you know 10 inches what's that 25 centimeters from the from the jets you know towards the the window they hit the window the water then cascades down and sits on top of the bristles the brush is slightly angled on the downstroke so all the water goes to one side so you have an amazing .

Flush and that is the principle why we don't need a second phase rinse action and also with the paper that's why you can angle the brush so yeah so you've got a pivot in there this one's a bit tight but you've got a pivot in there you don't need to angle the pole you angle the brush just twisting the pole so that .

The pivot turns nice you see you know a lot so let me just see what this this question was given to us by wayne at windows washed uh in the us and so he is talking about that so we've talked about the flow rates oh so which tube like for example if you .

Have a 5 16 inch tube um like our old rhino tube we don't sell that anymore but if you have that and you don't have a green one by the way on the right yeah that kind of id od compared to high flow which is this od like so so if you have um a thin tube which is really designed for pencil jets right because the the .

Pencil jets two or four pencil jets don't need as much water as 26 jets no matter what no matter what the diameter of the orifice of the jet stream so that the the 5 16 tube is a carry over from the um original water fed pole brushes that have been selling for 50 years right .

So you really want to go ideally you want to go to a 3 8 inch od tube or 10 millimeter od tube and what that will do for you is give you double the flow rate at half the pressure right because the resistance is reduced right so you reduce the resistance the flow rate stays the same the pressure is half to achieve the same .

So so what we want to do from that perspective is make sure that you can choose the right brush that you want for the conditions that you have or the equipment that you have and the flow rates that you have and the water that you're carrying until you understand the the technique .

Using the radial technique that you don't have to go back and do a rinse so most of the water is in in waterhead window cleaning has been used in the rinse phase chase especially on hydrophobic glass where the water repels the glass repels the water then you've got to kind of chase the dirty water off the glass with the pure .

Water in order to not leave spots on the glass and you can't tell the difference between dirty and clean water because they're both transparent so then you spend more time rinsing to make sure you've done a good job otherwise you get called back because there are spots on the glass so with radial brushes all of them .

The the brush in the downstroke turns all glass hydrophilic which means the water will cascade now if you get a cascading rinse the last thing on the glass is going to be what is left on the glass the water cascades it's spot-free water um there's no minerals in it so the water then will bead on the glass the beads will evaporate and when the .

Beads of water have evaporated there's no minerals to be left on the glass because minerals can't evaporate okay so so our job is to from an efficiency point of view in the radial technique is to combine the agitation and the rinse into the same action so you agitate on the upstroke rinse on the downstroke .

Move to the next window now that takes some confidence because you know people have been doing this for 50 or 50 years and having a rinse phase so they initially what we find is guys coming from you know the tucker technique to the to the radial technique um still habitually rinse and of course there's always a job where you will want .

To rinse more for your own peace of mind and or because it was crazy dirty i mean one of the tricks on the rinse by the way which which i might as well add here is that if you have a flat brush and it's a really dirty window and you push the brush up the window that you're disturbing the dirt into the water right but you're actually pushing dirty water .

Up the glass now you pull down and that dirty water is what you're pulling down so again if you're angling the brush you push the and it's only like five degrees pushed up all that dirty water is running off to one side right come down you're putting pure water on the glass now you may have to do that two or three times hopefully .

Two two is the ideal for maximum efficiency well one is better but you know that's regular cleaning so the intention is to make sure that you've got the dirty water off in the upstroke and you're leaving the pure water on in the downstroke right so let's see what else he asked me are the rinse bars interchangeable yes .

So the structure of both the light and the ultralight is they have one screw here you take that one screw off and then remove the end cap and remove the end cap yep and then and then you can see the rinse bar there is uh butting up into the brass swivel there so this moves yep so it can .

Move with you and that will then give you the ability to pull these rinse bars off always do it straight because they are um in order to maximize the flow rate on the inside of the rinse bar the wall thicknesses are not so thick all right so we can get more water in there so you .

Just want to make sure you do everything you know parallel to the channel i mean it's held in the channel anyway yeah otherwise the rinse position will change if you put it in the wrong wrong uh no no not that this is more about just the removal and replacement of them is to make sure that everything is aligned because if .

Something's out of alignment you're going to apply force at a non line in a non-linear sense and that could potentially break apart right it doesn't happen i don't even know if it has happened but it's an important thing to know right because you're basically sliding it inside a channel and it's really tight .

In there we're going to make a video on that but yeah so you can be sure that it can be easily done yeah and then so then you pull the rinse bars out check the orientation there's a little lug here right so when you take them out check the orientation of that you've got left and a right and then you slide the new ones in .

And you don't have to connect anything at the end you just need to connect here and then put your end cap back on and you've changed it from a high flow to a low flow so that's good we can do that that's good um sometimes we get asked about the white .

Non-scratch pad we the the only scrub that comes with it which is not relevant to the topic but is the white non-scratch pad at the moment we have magic eraser coming soon so we have magic eraser being set up for that magic eraser is good for getting silicon sticker residue those kind of things some of the sticky .

Sticky type of things which are film type things come off with magic eraser so there's a lot of guys using magic eraser for a lot of things signs of the flow rate understanding pressure resistance and flow we've done that so the flow rate will squirt further okay so i do want to cover this .

Thing that in fluid dynamics everybody wants to think about pressure but it's actually not to do with pressure you want this the low the highest flow rate at the lowest pressure possible what creates the pressure in a system because your pressure gauge is close to your filter right so what creates the pressure is .

The resistance that's being built up cumulatively by the the wall friction inside the tube and the effect of gravity as you go up so you've got 5 psi pressure back to your pressure gauge so that's your pressure gauge if you .

Increase the size of the tube you'll have less pressure less back pressure so you'll be working with less pressure right the nut the thing that we're actually looking for oh so so the reason why we change the size of the orifices of the jet streams is the smaller we make them the greater the final resistance all right so if you .

Imagine you've got a garden hose and you don't have anything on it and you turn it on the water may squirt this far before it falls to gravity as you squeeze it it you you create resistance all right and so that resistance then the flow rate is the same doesn't flow rate doesn't change at any cross-sectional part of a fluid dynamic .

System so you squeeze the tube the flow rate is the same resistance is greater pressure has increased behind the resistance and therefore the flow rate will travel at a higher velocity so when you see somebody's got jets coming out of the brush like this right they say i don't have enough pressure .

You have too much pressure probably what you don't have is enough flow rate so you can increase your flow rate by reducing the resistance and you don't that is irrelevant once you're getting your bigger holes basically so if you what we do the difference yeah so the difference between a high flow .

Rinse bar and a low flow rinse bar is simply the total sum of the cross-sectional area pi r squared of all the jets together so if they for example if they were all .

One millimeter or one unit we have 26 jets um then if they were two millimeter basically they'd have four times less resistance right the difference is that high flow in the lower place the diameter of the yeah so we've got less less more resistance with .

A low flow less resistance with a high flow with with more resistance as the final resistance in the system the water will squirt further right so so a high flow rate brush the water will squirt a shorter distance you know but we only want 10 inches if you've got pencil jets you need three feet because .

You're going to lift it off the glass and you've got to squirt and manage manage the pole and use all your core and all that stuff i know that many people are thinking oh but you're using so much water when if i'm going to go from the pencil get to the to the radial but actually many people who have changed have said it's actually less .

Water because you're cleaning faster and more efficient correct so the the the two go together is that you must have the radial technique yeah you know if you don't change your technique of course you're going to spend four minutes on a window before with your tucker technique and you'll spend four minutes using your tucker technique on .

This brush so you have to study the radial technique to understand how to clean windows faster and the the reality is that you'll use a higher flow rate in order to use significantly less time significantly less time maybe four times .

Less time right maybe eight times less time depending on how inefficient you are depending on how inefficient your brush is right now you can check that video by the way yeah radial technique on the youtube channel or if you go to the the radial page in the future cleaning web store .

You can check the technique there it's a few minutes very simple to just understand how to how to you how to execute the radial technique and then you can just practice it a bit so that you can get get the tempo up i like this i don't have to repeat you it's all about speed baby before we .

Didn't have martin's voice very very high and uh i'd repeat what he said that was very easy for me hopefully you guys can hear me a little better now we have added uh we have a lavalier mic on parry and then we're using a phone actually and then we're gonna like sync those sounds together when i'm talking so that you can hear me .

Because we had some we had some uh people mentioning that so i thought we sort that out hopefully hopefully it worked better and then we've got some super high tech coming haven't we yeah so um i think .

That pretty much uh covers it if i talk about that the smaller id tube increases the back pressure on the pump guys think that's cool but actually we want more flow rate at lower pressure um yes and then the the issue is just change change your .

Technique so i had that whole conversation with with and we can we can't repeat that enough the technique is so important yeah so we when we've got other video like another video it says like you know the lawnmower replaced the size but you don't use a lawn mower like a scythe or the jackhammer replaced the crowbar but .

You don't use a jackhammer like a crowbar or the vacuum replaced the broom but you don't use a vacuum cleaner like a broom if you realize that that that this is actually a high-tech revolution of a very simple product it's a brush but it but the changes are multiples then we're not talking about .

Five percent incremental change or ten percent incremental change we're talking about uh multiples of change like two times four times eight times faster by mastering the technique and trusting the design of the tool and then using the tool the way it's designed and and the end result whilst we understand that .

You know radial brushes are expensive the the feedback that we get for the guys who have studied the radial technique and switched from another brush system to our brush system they talk about it paying for itself in one day or in one job like that you know .

It's fascinating so so it makes us very excited but we understand that there's still a long education because the market is obviously still only going to sell what they sell so people will be tricked into buying lower efficiency products at a lower price but actually the most expensive part of auto fed window cleaning is the labor so if you .

Want to focus your attention on what part of the business to to maximize you maximize your efficiency with with high efficiency tools so you pay more for the tools and the guy works faster and you make more money way more money way more money and also we have a lot of testimonials .

On the on people our left test left the review on the different crazy crazy numbers yeah it's like 900 bucks in two hours 1200 bucks in two hours you know like that and they just quoted it the way they would have quoted it before and then they just find themselves incredibly efficient and then i've got other testimonials where guys have gone .

In with their radial gear to help out another window cleaner on a on a on a on a residential compound like a complex with lots and lots of houses or a business park complex and then they start at the same point and they work their way around to meet each other and the guy with the radial you know it meets the guy two-thirds of the way .

Around the guy goes how the hell have you cleaned the windows are you sure you've cleaned them and all that and he goes dude like you know i just reach it yeah using the correct technique with the high-tech brush that you can you never lift the brush off the glass you just it always stays on the glass and you have never have any dirt really .

Inside except for the agitation the rinse you always get the rinse yeah pencil just where the the rinse is inside and the other the other rinse bars that are on the market like trying to emulate what what reach it has done but they they basically emulate what we did in .

2015 which is squirt the water straight at the glass and when you press a brush against the glass you splay the bristles out so there's one inch added this side one inch that side they then make sure that the rinse bar doesn't start at the edge of the brush because they scratched the glass and the frames are .

The first generation of some you know unknown rinse bars scratch the frames the radial are perfect for the for the corner as well because you can you can really get into the corner and rinse at the same yeah we somebody sent me a video of you know one of the great infamous trainers saying you can't put a .

Round brush in a square corner so he sells square cornered brushes but if you have a square cornered brush in a square corner all you can do is poke it into the corner and try and disturb things but with a round bristle you can scroll through the corner so you're basically scrolling the bristles with the debris and then you're going down .

The frame with all the water pouring and running all that off and also the the bristles goes outside the block so they actually yeah the place doesn't need to touch yeah they splay basically an inch either side so when we call this a 14 inch brush the block is 12 inches the the width on the glass when it's fully .

Compressed you know so that these are on the glass the inside bristles um then then you'll get a 14 inches on the glass the reason we did that is because if you want to know between using a 14 inch brush or an 18 inch brush you know small windows like like squeegees you've got to use a small squeegee on a small .

Window but on a big window switching to an 18 inch brush on a 32 inch wide window you can clean the left side clean the right side and overlap in the middle and you've got two actions and you've cleaned the window so that's another form of efficiency is choosing the right brush but we digress so there's many there's many there's .

Many things in the technology that makes it so easy to reach different parts of the window it's like the pivot it's the bristles going outside the block that the new and also the rinse on top so there's a there's uh there's a lot of things and if you want to know more we have a new series called .

The tech behind the tool where we go into detail on each of our brushes that's going to be coming on youtube from beginning of next week i think yeah next week being uh march march 23rd yeah something like something like that maybe a little bit too yes all right because these could people can watch this in 2027 they can .

Really understand what is the technology yeah all right let's wind it up on that one and we'll go to and make another video for you wait okay so thanks very much that's q a friday if you have any comments um we do read the comments and we answer them so if you've got any comments or questions please um put them in below where you see this video and .

We'll uh we'll engage with you yeah cheers


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