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Jake

Microbore vs minibore



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Jake

so who uses what?

 

I use 8mm minibore, but wondering what the advantages/disadvantages of 6mm microbore are?

 

Does 6mm drain battery faster?

 

Does it cause the pump to work harder?

 

Does it restrict flow rate, to the point you need to up the flow compared with 8mm?

 

Be grateful for responses, and be really good to know from anyone who's used both...

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steve garwood

I use whichever is the thinner one. I cant remember which is which now! Been using it 6 years without any problems

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dredge3

Changed to 6mm due to fitting electric reel, which only does micro.

6mm is lighter and easier to pull.

8mm doesn't Knott, no where near as much as 6mm.

Cant tell any difference in pump etc

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jimmyboots

I use 100m of 6mm microbore for Van mount and 30m of 5mm pole hose for Trolley. The thinner the hose the lighter it is.

No matter what size hose you use, the pump has to force the water through two, 2 or 3mm jets anyway so water is always going through a 4 to 6mm gap.

The trolley pump has never missed a beat with the pole hose and is so light it's like there's no hose there at times.

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Jake
I use 100m of 6mm microbore for Van mount and 30m of 5mm pole hose for Trolley. The thinner the hose the lighter it is.

No matter what size hose you use, the pump has to force the water through two, 2 or 3mm jets anyway so water is always going through a 4 to 6mm gap.

The trolley pump has never missed a beat with the pole hose and is so light it's like there's no hose there at times.

 

 

That's what I was thinking, but not sure if having a longer run of thin hose would out more strain on the pump..

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Jake

@steve garwood do you find the 6mm causes the one shot to produce more over spray after you click the button?

 

That's what I need to know, if not then I'll get some, but I don't want the extra pressure from a 6mm hose causing more water loss after I click the button...

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♠Winp®oClean♠

You will require slightly more pressure for 6mm hose over 8mm hose. The longer the hose the more pressure is required to pump water through it so the pencil jet theory (at the very end of this line) isn't quite reflective of the actual situation. I had to increase the pressure cut off value by one notch on my varistream when I switched to 6mm. 6mm hose is lighter and a bit more easy to manage. I've done approx 10 years with 8mm and 2 years with 6mm if that helps.

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Jake

Cheers, not sure about it really!!

 

Only need it if I get the electric reel, but hoping to get one in the new year, so Might convert to 6mm then...

 

At the mo, I can't find the power up HD that waterworks were supposed to be selling, and they were supposed to have a radio switch to reel the hose in, that needs to be 6mm apparantly, to stop the hose falling over the sides of the reel

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Jake

That's the one I want :thumbsup:

But want a remote to control it when away from the van

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steve garwood
@steve garwood do you find the 6mm causes the one shot to produce more over spray after you click the button?

 

That's what I need to know, if not then I'll get some, but I don't want the extra pressure from a 6mm hose causing more water loss after I click the button...

Not sure what you mean by overspray Jake. My one click has a slight delay when turning it on. I have my varistream set at 45 and I set the calibration automatically. My other van that my worker uses has 8mm, my van has 6mm which I prefer as its less cumbersome, so easier to manoeuvre:thumbsup:

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spruce

We had hose (minbore is all we have ever used since the dark 1/2" hose era) that has swollen a little under pressure. This acts as a pressure reservoir and causes the spray @Jake refers to @steve garwood.

 

This is usually more noticeable with warm water users.

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Jake

@spruce wjat I mean is, if I use 6mm microbore, I'm concerned I'll get lots of after 'dribble' when I click the one shot, cos the 6mm hose is surely gonna be more pressureised than 8mm minibore I currently use,

 

Also, I'm a bit confused as to weather or not the 6mm will reduce flow, and will it mean I need to up the flow on the controller? I don't want to lose flow, as o already run high flow, and want it to remain high,

 

One of the reasons I went for 3mm jets is so i get maximum flow for rinsing, I don't want that to be compromised by the 6mm hose spruce? I've heard conflicting results, some say it makes no difference, but some say it reduces flow....

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Jake

Yeah that's what I mean mate,

 

Ok that's good to know, but are you using high flow?

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steve garwood
Yeah that's what I mean mate,

 

Ok that's good to know, but are you using high flow?

No, I run at 45 cold, 55 warm

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spruce
@spruce wjat I mean is, if I use 6mm microbore, I'm concerned I'll get lots of after 'dribble' when I click the one shot, cos the 6mm hose is surely gonna be more pressureised than 8mm minibore I currently use,

 

Also, I'm a bit confused as to weather or not the 6mm will reduce flow, and will it mean I need to up the flow on the controller? I don't want to lose flow, as o already run high flow, and want it to remain high,

 

One of the reasons I went for 3mm jets is so i get maximum flow for rinsing, I don't want that to be compromised by the 6mm hose spruce? I've heard conflicting results, some say it makes no difference, but some say it reduces flow....

 

 

@Jake I don't know the answer to your question as I have never used microbore.

 

The boys from Aquadapter were experimenting with smaller diamt pole hose a few years ago.

 

I found this correspondence from June 2102 from Aquadapter that you may find interesting (albeit a smaller length of pole hose);

 

We have done some testing with it, however, we would also like some confidential feedback from more users before it goes on general sale. It is of the same materials and specification as our dark red hose (which some of you tested for us, thanks) but is 6mm Outside Diameter and 4mm Inside Diameter* (current hose 8mm ID/5.5mm ID).

 

 

 

Flow Controllers

These should work with a smaller bore hose with little issue.

You will need to recalibrate the controller DE setting after fitting the smaller bore hose.

Turn the flow rate down (see Pumps).

If possible, avoid any extra angle fittings on the hose which will increase pressure. Ideally there

should be a straight run from the pump to the Aqua-dapter / Brush Head.

Please let us know before using the hose with a Williamson Varistream.

 

Pumps

It is to be expected that a smaller bore hose will increase the pressure in a system giving a faster

jet at the brush head but reducing the speed of the pump.

In theory the pump works at a lower speed to generate the same flow at the brush (hence the

note above about turning down the flow rate on the controller).

Where no controller is used the effect of the smaller bore hose may be to increase the pressure in

the system. With the pump working 'flat out' the effect of temperature and hose wall expansion

(see below) could put additional strain on the pump as it has to work harder to generate the

pressure and force the slow moving water.

 

Hose Wall Expansion / Ambient Air Temperature

Hose wall expansion can be dependant on the stiffness of the hose wall. A soft hose wall would

expand a lot so slowly building pressure whereas a hard wall (as our hose is) will build pressure

quickly. With a soft hose wall the water could take slightly longer to begin flowing.

Ambient temperature effects hose wall expansion and the viscosity of the water.

Cold water, near or at 0°C, flows more slowly than warm. Lower temperatures also effect hose

wall expansion rate as a cold hose expands more slowly. Our hoses should be more consistent in

warm and cold weather (or warm/cold water) due to the construction and materials used so,

although any hose will be affected to a certain extent, on our hose the effect should be minimal.

When using a flow controller re-setting the DE calibration should take care of both these effects.

 

 

Because I use a Varistream I was excluded from the test experiment.

 

In the early days when suppliers first started offering minbore and microbore hoses in place of 1/2" garden hose, Williamson pumps wouldn't guarantee their Shurflo pumps if we used those sizes. They said it created extra strain on the pump - they should know. We chose to go the minibore route as the hose wasn't as small as microbore and still easier to manage. I decided that we would bear the cost of our own pump failures as using minibore was a major step forward.

 

Alex Gardiner didn't rate Shurflo and sold Flojet which he maintained was a better pump. He believed that Microbore was the way to go from what i remember. With experience we never had issues with pump failure, only with pressure switch failure. The analogue controllers Varistream first introduced solved that problem and allowed us to regulate our water flow. I maybe wrong, but I don't think at one time Alex used to use a flow controller, so found the microbore restriction gave a good flow rate at the brush head which he was comfortable with.

 

Again, I maybe wrong, but Alex was never an advocator of 3mm jet sizes, he always recommended 2mm.

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Jake

@spruce sinve I've used 3mm jets my work has sped up incredibly, the flow rate is better, the cascade effect on rinsing is soooo much better, I would 100% recommend 3mm jets,

 

But my issue is will the 6mm microbire be that bit too narrow to really produce enough volume of water... Difficult to know!

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Jake

Mate I'm too impatient to be messing about with a trickle of water :D

 

I like it fast, it's so much quicker to rinse !

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spruce

Have a look at this @Jake.

 

http://www.flourmilling.co.uk/water.html

 

I realise its steel pipe but I see the flow rate difference between 6 or 8mm bore steel pipe is considerable. 6mm 0.022 as opposed to 0.056 liters per sec 8mm. So a 6mm tube will only allow 1/2 the volume of water at 4 bar. Our hose coiled up around a hose reel will probably reduce those figures a bit.

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Jake

Now all I need is a powerup, but annoyingly Jordan recommends 6mm hose as it has less chance of overlapping the reel...

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spruce
Now all I need is a powerup, but annoyingly Jordan recommends 6mm hose as it has less chance of overlapping the reel...

 

That stopped my buying one as well tbh.

 

However, if you head into the warm water realm, then the 6mm bore hose should be enough as the water is thinner.

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