First of all: 1/2 inch for a main is ludicrous.
Second: what is the incoming pressure?
Third: Well or City?
Fourth: How high is second floor above incoming line?
Sounds like a generally poorly designed system in dire need of major upgrade to me, but impossible to help due to lack of info.
Second: what is the incoming pressure?
Third: Well or City?
Fourth: How high is second floor above incoming line?
Sounds like a generally poorly designed system in dire need of major upgrade to me, but impossible to help due to lack of info.