water flow (plumbing)

[Pro Tour Punditry]

Without wanting to detract from the engineering* brilliance, could you not just use the taps in your house?

*I am not even sure if it is engineering

 

[slowmotion]

Without wanting to detract from the engineering* brilliance, could you not just use the taps in your house?

*I am not even sure if it is engineering

Because it wouldn't be any fun?

 

[Pro Tour Punditry]

Because it wouldn't be any fun?

Yeh, Saturday nights round at Reiver's place are legendary...
[QUOTE 4924383, member: 9609"]

I have set up a water butt in the garden with the intntion of filling up watering cans [/QUOTE]

 

[slowmotion]

[QUOTE 4925385, member: 9609"]it gets more exciting than that though - I now have a ruth rendall style murder mystery.

the shelter roof is 94 x 98 inches, and last week we had 17.3mm of rain, therefor I should have captured 103 litres, but I only got 87 litres - so there is 15% missing - WHERE HAS IT GONE ????[/QUOTE]

 

[classic33]

[QUOTE 4925385, member: 9609"]it gets more exciting than that though - I now have a ruth rendall style murder mystery.

the shelter roof is 94 x 98 inches, and last week we had 17.3mm of rain, therefor I should have captured 103 litres, but I only got 87 litres - so there is 15% missing - WHERE HAS IT GONE ????[/QUOTE]
Warm weather caused the water to evaporate.

 

[slowmotion]

Rain bounces off and splashes elsewhere, plus this ^^^^^^^^^^^.

BTW, have you checked your pipe joints...?.

 

[PaulSB]

Well I know nothing of water flow rates but have five interconnected water butts to collect run off from my shed.

Aside from the pressure created by the head of water surely the limiting factor, which no one seems to have mentioned, is the size of the outflow tap? Obviously I'm presuming your outflow is from a tap fitted to the butt.

This is certainly the case on my water butts - an extra 20 seconds to fill a can isn't life changing though!!

 

[swansonj]

[QUOTE 4925385, member: 9609"]it gets more exciting than that though - I now have a ruth rendall style murder mystery.

the shelter roof is 94 x 98 inches, and last week we had 17.3mm of rain, therefor I should have captured 103 litres, but I only got 87 litres - so there is 15% missing - WHERE HAS IT GONE ????[/QUOTE]
It's gone into the ocean where it is contributing to the rising sea levels. So all this talk about melting sea ice is a distraction- it's your shed roof we ought to be focussing on.

 

[swansonj]

[QUOTE 4925367, member: 9609"]
...- took some measurements today and from half full it is running at 4.95 seconds per litre, which would be a very tedious 22.5 seconds for a gallon into a watering can. Surely I can get it to under 10 seconds without employing noisy motors.[/QUOTE]
Ours is even slower and I offer you our high-tech solution: two watering cans. Leave one filling while you take the other down the garden to water the vegetables.

 

[Joey Shabadoo]

Ours is even slower and I offer you our high-tech solution: two watering cans. Leave one filling while you take the other down the garden to water the vegetables.

Such profligacy - clearly not a Yorkshireman.

 

[Yellow Saddle]

[QUOTE 4925385, member: 9609"]it gets more exciting than that though - I now have a ruth rendall style murder mystery.

the shelter roof is 94 x 98 inches, and last week we had 17.3mm of rain, therefor I should have captured 103 litres, but I only got 87 litres - so there is 15% missing - WHERE HAS IT GONE ????[/QUOTE]

Did you remember to round down by the sine of the pitch of the roof?

 

[Yellow Saddle]

[QUOTE 4926693, member: 9609"]Sorted the problem out with the flow, took off the garden hose with its 90 degree bend and replaced it with 20mm flexible hose set in a gentle curve. The tank connector is salvaged from a wagon radiator that I have glued in place with hot melt. It could last a week or a decade but for now it is leak free. So there is 1.5 metre at 25mm internal then 1.2 metre at 20.2mm

flow rate increase over the same fall in head from 22.5 seconds per Gallon to a more respectable 6.9 seconds per gallon (which is nearly double the speed from our mains connection)

It still has to be connected to a tap which is going to slow it to some extent, but I have ordered (goes against the grain but I am having to buy something ) it is a 3/4 inch straight through with lever valve, so should be quick to get to full flow.

View attachment 369397 [/QUOTE]

I love it when a plan comes together.

Now for the next step. Calculate the turbulent flow in that spiralled pipe and see how much better a smooth pipe will make it. Report back with the findings.