New long water main help

[volscrazy65]

I have to run a water main that's 1500' long with 250' in elevation gain with 180 psi at the meter. I was told by a septic tank guy wanting to run the water line that I'll need a 1" meter and 1" pipe with 3 pumps to have any pressure. I'm not wanting to deal with pumps at all. My local water co. said a 3/4" meter with 1" pipe and no pumps will be plenty. My options for meters are 3/4" $1800, 1" $3100 and 2" $5000. I'm planning on doing myself with HDPE. Also can I run two HDPE lines touching in the same trench or with they wear on each other?

 

[breplum]

the simple science is that you loose .433 lb of pressure for each foot of elevation change ...so that puts you at a static loss of 105 psi, leaving you 75 psi.
UPC chart only goes to 1,000 ft, and shows at over 60 pressure range, a 3/4" meter and 1" pipe gives you enough pressure for 11 fixture units and with 1-1/4" pipe, 21 f.u.
11 fixture units would break down to 1 10 f.u. tub/shower and one lav. no improvement with a 1" meter.
at 1,500', fugedaboutit without a pressure boost system.
Have an engineer design it unless you have a damn reliable plumbing contractor.