plan to cut the copper pipe
Instead of hiring someone to install a second meter, I'm planning to just cut the copper pipe going to the outside spigot. It's 3/4" pipe then becomes 1/2" then to the spigot. Or maybe, I'll use a 1" copper pipe instead of 3/4" like what I said on the drawing.
Below is the picture of what I will be cutting. Can someone please make some comment about my drawing like if something is missing or it's totally wrong?
Any help would be greatly appreciated.
3/4 reduced area will affect flow rate, but only a small amount
what you need to know is the total gallons per minute that your system will need at the zone with the highest flow.
Gallons per minute can be converted into the pressure loss at how many feet of pipe at whatever diameter,.
you can get by w even 1/2 inch pipe, if you had to ( which you don't) if you're willling to make sure your zones are very small.
how big an area are you irrigating, per zone?
Sillcock: a normal outdoor faucet will freeze, bursting the pipe in winter.
An "outdoor sillcock" is designed to empty all the water that is on the outside of the wall, only having water on the indoor( heated) area, so it can't freeze