Help a noob, water line 101

[mwv247]

Gents,
Im a few months away from building my new home and garage! Its very exciting. Im trying to do as much leg work on my own as possible. One of the things I need to do is route my city water line down our long drive. Currently its a 3/4 tap with 1" line on it. Theres approximately 200ft of line existing however I need to extend this line 1000 feet. Im thinking of replacing this 200 ft of 1" with 2" pipe and running a total of 1200 feet. Do you think utilizing the 3/4" tap will cause any long term issues. I expect it to function ok and deliver decent pressure. Thoughts? Not really garage related but a lot of great minds in here.

 

[sberry]

The tap wont hurt much, you are probably in the ballpark with 2 inch. I have 400 ft of 1 1/2 and 250 inch and have great service from a well. Your city water pressure may be better.

 

[188slo50]

For a home and garage a 3/4 line is plenty you will never run all fixtures at one time so a greater volume wouldn't be needed. Why is the city tapping with 1" taps and going to a smaller line size? I work for the water dept in my municipality and we have 5 bay car washes that only run a 1.5" line and they have plenty. Google it but there is a formula you use to figure out what your GPM's would be on a appliance I just can't remember of the top of my head how to do it.

 

[DHCrocks]

a 1" pipe for 1200 feet will have too much loss, you will have very low pressure. to give you an idea 1200 feet @ 20 gpm on a 1" pipe is about 105 psi pressure drop. for the same distance a 2" pipe is about 4 psi drop. the tap size is irrelevant that only determines your maximum flow. the friction loss in the pipe is the big factor on a long run like this.

 

[gdh33]

I concur with DHCrocks. A quick google search found an online friction head calculator and I get roughly the same pressure drops. I am not stating that this is 100% the correct numbers, but I know the theory and increasing the pipe size like you plan to do is the way to go.

 

[mwv247]

Thanks Gents, This has been a big learning experience. Ive been very blessed along the way. I went to the closing expecting to be buying 2.5 acres and ended up with 6 for the price I was planning on paying for the 2.5! I decided to build in the very back of my lot and have had to put in a road, clear out an acre and deal with a creek. Looking most to having a new garage and a good buffer from neighbors.


Heres some progress photos:








Dealing with this the next few weeks.... Had an stupid amount of rain happen last year and just now got enough money to fix the issue....



Future homesite:

 

[jhelrey]

Good thing you have a Jeep

 

[kbs2244]

I hope this is not a DIY project
You need "professional grade" equipment for that route.

 

[CNGsaves]

Wow, that is a huge "country" lot to be within connection of city water service !! NICE !

So I'm guessing you are getting electric and water only ???

Thus, no sewer service (you'll be on septic) ?? Also, you'll be all electric or propane for heat ??

Let's see plans for house & garage. Inquiring GJ eyes would like to SEE !!