My water meter is 3/4" and I ran 1.25" PVC to it. Had to buy the pieces to make it fit.

5/8" water service is not offered where I live.

A.Y. Mcdonald 74620 5/8in Straight Meter Coupling - Swivel x MIP w/Wire Seal Hole 5124-109 - A. Louis Supply

3/4” METER SWIVEL FITS 5/8” X 3/4” OR 3/4” METERS Meter Swivel x MNPT 5/8'x1/2'x2.38' Meter swivel nuts are less saddle, have internal straight threads per AWWA C700 and include hole for wire seal unless otherwiseindicated. EPDM rubber gaskets are supplied and are standard.

alouissupply.com

 

You may need to go to a specialty plumbing store (not a Home Depot) to get the necessary adapters and gender benders etc. to connect to the meter. You may also need a span of horizontal space to fit all those pieces onto the two meter connections, possibly doubling back with regular copper or pex or PVC etc. under the meter two feet to get back to where the cold water pipe was positioned.

Can you draw an accurate picture or diagram (size wise) of the meter connections? Embossing the paper by pressing it onto the metal pipe in various ways may help you draw the picture. Use this picture at the store to be sure you got the right size.

 

5/8" is what water company charges you for. You want a 3/4" water meter spud/ coupling. Im not sure if you can get a version with a sweat end...but the other end will be that 1" fitting to the meter so the meter can be replaced. Without too much hassle.
Consider a shut off valve on your side of the meter too.
Fergusons sells the spud for like $4. Home depot is more like $14.

 

Consider a shut off valve on your side of the meter too.

Worth repeating! My meter valve quit shutting the water off all the way 10 yrs ago so I installed a PVC valve on my side of the meter. Now I can completely shut off the water if I need to ..... and don't even need to use my water meter key.

 

my water company prefers I call them for a courtesy shut off which involves turning 1 valve off. but it's their meter and if something goes wonky with that valve then they have to shut off the whole area to replace the valve...so they are trying to avoid homeowners cranking down the meter valve because they are doing maintenance and causing a chain reaction of problems. So I added a full open ball valve (with a union or swivel adapter of some kind so that valve can be replaced) in line a little way away from the meter (mine is in the street) so I can isolate leaks. I already have a house main valve but with 150 feet of pipe between the meter and the house valve I decided I should add my own main valve. Now I have 3 ways to shut water down to the house and 2 of them are under my control.

if your meter valve is broken then eventually the water company will replace the meter and the problem will be solved. It's a bit involved for them which is why they need to be prodded into replacing the valve.

 

if your meter valve is broken then eventually the water company will replace the meter and the problem will be solved. It's a bit involved for them which is why they need to be prodded into replacing the valve.

Depends on the water company too. It's hard to get ours to do anything that doesn't directly benefit them. They promised me a couple of times that they would replace mine but never did although they have since modified the meter to put in a remote read device so they can just drive by and not have to get out to read it. About a yr ago the county chewed up the steel cover to my meter. They told me 3 times they'd see about getting it replaced. I told the water company twice, the 2nd time they told me that I needed to be patient. My meter froze during the deep freeze at the end of december. My meter now has a wood cover that I built.