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Small Cabin Forum / General Forum / Garden Hose Y Flow
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paulz
Member
# Posted: 25 Jul 2022 16:06
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I bought a 'high flow' garden hose Y with ball valves. I expected the valves to have garden hose size holes, 5/8 or 3/4, but they are only maybe 3/8 or 7/16. So I tested it, filling a 5 gallon bucket in 45 seconds from my well pump, with and without the Y. I expected the small holes to slow it down, why doesn't it?
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gcrank1
Member
# Posted: 25 Jul 2022 16:20 - Edited by: gcrank1
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The small holes increase the outlet pressure, they dont reduce the volume being delivered.

paulz
Member
# Posted: 25 Jul 2022 16:54
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They may be true to a point, what if the hole was 1/8", not going to fill a 5 gallon bucket in 45 seconds that way.

gcrank1
Member
# Posted: 25 Jul 2022 17:06
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Or it would be a snotty pressure washer or even a metal-cutting water jet?

Irrigation Guy
Member
# Posted: 25 Jul 2022 17:40 - Edited by: Irrigation Guy
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The small hole doesn’t make more pressure (pumps and elevation make pressure) it increases the velocity, it will also cause pressure loss through friction but in such a small fitting it is negligible. If you choked it down to 3/8 for 50’-100’ you would see lots of pressure loss

gcrank1
Member
# Posted: 25 Jul 2022 19:37
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Ah, yes, thats what I was thinking but couldnt say right....
Good thing we have pro's around here

spencerin
Member
# Posted: 26 Jul 2022 01:30
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Fluid dynamics is like Greek to me.....

gcrank1
Member
# Posted: 26 Jul 2022 09:55
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Im pretty good with the 'water goes downhill' part....

paulz
Member
# Posted: 26 Jul 2022 10:08
Reply 


Yeah same here. To make matters worse, I use the water analogy for volts/amps/ohms understanding!

That's why I have to do real time testing as above. I also know that replacing the 400' of garden hose with 1" poly pipe makes filling my water tank much faster.

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