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I have a large water container that I regularly fill from a 30m long garden hose (15mm diameter). The hose needs replacing as it old, kinks and is a pain to put back on its reel.
The quicker it fills.. the better.
Will a thicker diameter hose make the job any or much quicker? There are 19mm or even 25mm hose options.
Yes, a large difference. Get the larger if flow rate is the only consideration.
How big is the pipe that feeds the tap? That plus water pressure will govern how much flow goes into the hose. Long narrow hoses will perform worse than wider hoses but the flow rate at the tap is your ceiling.
If you time how long it takes to fill a bucket at the tap and how long it takes if you use the hose that'll tell you if it's worth going for a bigger diameter.
Fill it with rainwater, dispense with the hose
on the other side of this I bought a couple of these (but an older version) https://www.hozelock.com/product/micro-reel/ which use a narrower than usual hose, and the flow rate is terrible.
Science answer.
The ratio of friction to cross sectional area makes a huge difference. An increase in diametre has a big effect on the cross sectional area but only a very small effect of the circumference (inside of the pipe provides the friction) so evdn a small increase in diametre has a big improvement on flowcrate.
It also affected by length (friction again) and bends/changes in direction.
Having said that, as above the flow rate of the tap (a gate valve would be a better choice as that open the full bore of the pipe) is your ceiling. And any connections aswell. If the connections are in the hose bore thats a loss.
i assume the tank is for a camper or something because no one would be daft enough to fill a water butt from the tap with drinking water. It's bad enough that the majority of our drinking water is shat in then flushed away.
For a 2 bar head pressure through 30m of hose the flows would be roughly.
5L/min for 13mm bore diameter.
18L for 19mm
42L for 25mm
This is of course assuming no restriction from the supply side of the tap..
The increase os highly exponential because two exponential relationships are multiplied together. The sectional area and therefore water velocity per liter is proportional to the square of the diameter. Furthermore, just like with cycling, the drag force increases exponentially with velocity.
Fill it with rainwater, dispense with the hose
Its probably a dirty sex pond he’s filling , but was too ashamed to mention it directly.
Should do but then so will the laminal flow versus turbulent flow, so Teflon coat the inside of the hose.
Fill it with rainwater, dispense with the hose
Its probably a dirty sex pond he’s filling , but was too ashamed to mention it directly.
Lol.. it is for a dirty sex pond.. but not mine. It's part of a job that I do.. I maintain a holiday rental property (not mine) and change the sex water after every guests have stayed. I was looking for a quicker way to get it filled..
It's fairly obvious. The equation involves pi on some way.
I know because I ballsed up my Cambridge interview by not knowing it!