GPM a little low

In 1 minute I got about 4.5 gallons from my hose bib. Does that sound slow to you? This is city water in Portland Oregon. Inside piping is all new copper.

Been having problems with flow when multiple things are running. So I am wondering if its worth the $400 to replace the main line to the street. This old line is original 3/4" 1950's galvanized.. So I know its probably rusted down to 1/4 inside.

Tim

I think you've answered your own question. Even if this didn't solve the problem, that old galvanized line has to be on its last legs. I'm surprised it hasn't sprung a leak by now.

I know, I just don't want to waste $400 to find out the new line didn't change much of anything... Plus I'm lazy, digging a trench is going to suck.

Face the facts. 60 plus year old galvanized pipe has to be toast and will have to be replace soon regardless, and you have the luxury right now of not being pressed to do it overnight. Not knowing the details of the job, it's hard to be specific about options, but there are companies that can do underground pipe replacement without trenching. Don't know if this would be a viable way for you, and of course the trade off is money. If you did need to dig a trench, you might consider hiring a couple of casual laborers. That would be cheaper than paying a plumbing contractor to do the grunt work. While you are at it, consider a 1" line of either PCV or copper. Cost of materials won't tear you up and that extra size will give you plenty of flow.

If your valve is an ASSE 1019 approved wall hydrant, code requires a minimum flow of 6 GPM at 25 PSI differential.

I don't know what if any approval my hose bib has but it's connected with 1/2" copper to my well supplied 30-50 PSI and I average 6 GPM.

How MANY ASSE 1019 "wall hydrants" have you EVER seen in residences? And the "requirement" would be ridiculous if the water system is incapable of supplying that amount.