funboy6942
Lifer
- Nov 13, 2001
- 15,368
- 418
- 126
According to the calculations I found, a 1/2" hose 50 feet long will flow 12GPM at 40PSI.
That info is almost worthless since the sprinkler head should flow considerably less than this, but it does represent worst case scenario.
funboy6942
Lifer
- Nov 13, 2001
- 15,368
- 418
- 126
Q = A/V
Principles of Plumbing
The link calculation is slightly different than mine because they use the actual ID (Internal Dimension of copper tubing), and I ball park the ID to 0.5" instead of 0.6" for schedule 40 PVC tubing.
Corrected flow to 0.6" ID for PVC would be 5076 gallon in 12 hours @ 8 f/s (7.05 GPM @ 1/2 inch), however this calculation is for the absolute perfect condition. In reality it should be much less due to pipe friction (length), fitting friction, and sprinkler head restriction; therefore the cost should be less than $12.69.
According to the Canadian National Plumbing Code, cold water velocity is 5 f/s for copper pipe, and 8 f/s for plastic pipe (various manufacture rate their plastic pipe any where from 7.8-8 f/s)
The rating of 12 GPM seems a bit high because in my experience it take a lot more than 25 seconds to fill a 5 gallon bucket with a garden hose.
It does seem like it takes longer than 30 seconds to fill a 5 gallon bucket though. Hmm. BRB! 
Though I don't know the water pressure here.
Though I don't know the water pressure here.
BoomerD
No Lifer
- Feb 26, 2006
- 66,411
- 14,816
- 146
Originally posted by: Eli
It does seem like it takes longer than 30 seconds to fill a 5 gallon bucket though. Hmm. BRB!
Though I don't know the water pressure here.
Perhaps there are unaccounted for plumbing restrictions that are allowing the pressure but not the flow rate used in the calculations. (although if you have X PSI at the hose bib, then as long as the pipe size coming to that point is the same size or larger than the hose, you SHOULD get the flow rate expected.)
Locut0s
Lifer
- Nov 28, 2001
- 22,205
- 44
- 91
We don't pay for water here.
Well ok sure we do but it's a small flat rate included in your property taxes. No one thinks about the cost of using water since it's not billed by the amount you use. I'm talking residential use. Would be nice if we did pay for water is some ways, would promote conservation. You don't think much about the cost of using water when you live in one of the wettest cities in north America and most of your power if hydro as well.
Well ok sure we do but it's a small flat rate included in your property taxes. No one thinks about the cost of using water since it's not billed by the amount you use. I'm talking residential use. Would be nice if we did pay for water is some ways, would promote conservation. You don't think much about the cost of using water when you live in one of the wettest cities in north America and most of your power if hydro as well.
BoomerD
No Lifer
- Feb 26, 2006
- 66,411
- 14,816
- 146
Close...I'm in northern Kahleeforneeya...
Water meters are on the way. Ah-Nold signed a law mandating water meters for everyone in the state. IIRC, we still have 3-4 years before they're required though. IIRC, our water, sewer, and garbage are all on the same bill, and water is a flat monthly rate of about $40.
The first time I heard someone used that was on Married with Children when Al (or could have been Peggy) makes a comment on who the female passengers were on their cruise boat. I don't know why but it stuck with me since when referring to anything large or huge.
EDIT:
Here it is!
JEFFERSON Uh, excuse me, Gretchen, but, uh... I thought all the passengers were... [Al whispers something in his ear] Jurassic. Uh, I-I mean... jolly.
SpunkyJones
Diamond Member
- Apr 1, 2004
- 5,090
- 1
- 81
Heh, I'd love to have those contracts...Originally posted by: BoomerD
Close...I'm in northern Kahleeforneeya...
Water meters are on the way. Ah-Nold signed a law mandating water meters for everyone in the state. IIRC, we still have 3-4 years before they're required though. IIRC, our water, sewer, and garbage are all on the same bill, and water is a flat monthly rate of about $40.
I'm still amazed that there is still unmetered, central supplied water anywhere. I've heard of a flat sewage charge on a monthly water bill though.
alkemyst
No Lifer
- Feb 13, 2001
- 83,769
- 19
- 81
Here you get metered for water with sewage added to that. Sucks if you irrigate.
You can get a separate meter for $300 though that is only for water that doesn't go down a city water drain. In this case you pay purely for water. It's about half the cost.
You can get a separate meter for $300 though that is only for water that doesn't go down a city water drain. In this case you pay purely for water. It's about half the cost.
Bill Brasky
Diamond Member
- May 18, 2006
- 4,324
- 1
- 0
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