Water Line Size?
dpe...@hiwaay.net
I'm getting ready to run a water line for city water. I have a couple
of questions. The distance to the house from the meter is about
1500'. I'm considering a 1" line. Is this sufficient? Also I figure
I'll need a pressure regulator. Should the regulator be mounted at
the meter or the house?
thanks,
dp
Lyle Tuttle
dpe...@hiwaay.net wrote:
What is the pressure at the main? What is your elevation w/respect to
the main? What is the water "demand" in your house, ie, the fixture
count.
A 1" line, even without bends and fittings, will create a loss of
pressure due to the friction of the water passing thru the pipe.
For instance, using a Williams & Hazen formula for schedule 80 pipe,
a 1" pipe 1500 ft long would create a pressure loss of 35 # @ 8 GPM
flow. This is schedule 80 pipe -- what will you be using?
Go larger, mush larger -- you only pay once, but enjoy the benifits as
long as you live in the house!!
lyle
--
ltu...@primenet.com (Lyle Tuttle)
"Do what's right. Do it right. Do it right now."
unk...@someplace.somewhere.net
dpe...@hiwaay.net wrote:
>
> I'm getting ready to run a water line for city water. I have a couple
> of questions. The distance to the house from the meter is about
> 1500'. I'm considering a 1" line. Is this sufficient? Also I figure
> I'll need a pressure regulator. Should the regulator be mounted at
> the meter or the house?
>
>
> dp
First, 1 PSI equals about 2.31 feet of head. This means that for every
2.31 feet of elevation difference between the distant water main and
your house, you'll lose 1 PSI or pressure.
Now, as far as sizes, given the length is 1500', smooth, straight pipe:
For a 1" line, at 6GPM you'll lose 22 PSI
For a 1" line, at 10GPM you'll lose 57 PSI
For a 1.25" line, at 6GPM you'll lose 7 PSI
For a 1.25" line, at 10GPM you'll lose 19 PSI
For a 1.25" line, at 15GPM you'll lose 40 PSI
For a 1.5" line, at 6GPM you'll lose 3 PSI
For a 1.5" line, at 10GPM you'll lose 8 PSI
For a 1.5" line, at 15GPM you'll lose 16 PSI
For a 1.5" line, at 30 GPM you'll lose 58 PSI
For normal household requirements, 6GPM will handle the everyday things.
However, if you ever plan on using the water for fire protection, or if
you ever anticipate putting in a sprinkler system, you'll really need
30+ GPM. For those applications, even a 1.5" pipe is marginal.
I would say the lions' portion of the cost is digging the trench, not in
the incremental cost between 1", 1.5", and even 2" pipe.
As far as the location of the pressure regulator, I'd put it at the
house, so that the pressure inside the house stays fairly constant.
If you put the regulator 1500' away, it will regulate pressure 1500'
away , not at your house. As your water requirements vary, the pressure
to
the house is going to vary depending upon the pressure loss in the 1500'
pipe for the flow rate at that instant.
JBOBST
Excellent posts by "plumber, et al. If a 1 1/2" line will work, it would be
common sense to to go 2". We all see old water lines that close up slowly from
common lime deposits. The cost difference in piping can't be that
significant.
Very few city water supplies have excessive presuures. I lived in Lenox, MA
years ago, and with their reservoir on top of a mountain, regulators were
necessary to get pressures below 100PSI or better. I recall lots of water
main leaks, also. If that's your situation, the house should work just fine
at around 40 PSI.
JBO...@AOL.COM
Redwood Kardon
> dpe...@hiwaay.net wrote:
> >
> > I'm getting ready to run a water line for city water. I have a coupl=
e
> > of questions. The distance to the house from the meter is about
e
> > I'll need a pressure regulator. Should the regulator be mounted at
> > the meter or the house?
> >
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Vic Dura
dpe...@hiwaay.net wrote:
>I'm getting ready to run a water line for city water. I have a couple
>of questions. The distance to the house from the meter is about
>1500'. I'm considering a 1" line. Is this sufficient? Also I figure
>I'll need a pressure regulator. Should the regulator be mounted at
>the meter or the house?
I think I would go 1.5" on a long run like this. If you need a
pressure regulator, it should be located where the line goes into the
house.
--
Vic Dura (vpd...@hiwaay.net) DuraHaven, Rogersville AL 35652
W.J. Emerson
Vic Dura wrote:
>
> dpe...@hiwaay.net wrote:
>
> >I'm getting ready to run a water line for city water. I have a > >couple of questions. The distance to the house from the mete
> >Also I figure I'll need a pressure regulator. Should the
> >regulator be mounted at the meter or the house?
>
> I think I would go 1.5" on a long run like this. If you need a
> pressure regulator, it should be located where the line goes into the
> house.
I have a 1.5" line running about that distance and have plenty
of volume and pressure. I suspect 1" might do, but the
difference in cost to go to 1.5" might be worth the peace of mind.
Consider putting in a check valve near the public supply end of
your line. You can get them for under $20 at a plumbing store
or large "home center". Then, if the public line needs repair
or has a leak, it won't siphon all the water out of your lines
and hot water tank. And if your house is below any part of your
line, you'll have a bit of a reserve supply.
--
W.J. Emerson
fsa0...@wvnvm.wvnet.edu