My neighbor is on well water. She suddenly has very little pressure in her house. The tank is showing 60 or so psi, and when I bypass the filter, the problem does NOT go away, so I'm assuming there is a blockage somewhere between the filter and the house. She has a 3/4 inch PVC line from the filter to where the pipe goes underground to the house, about four feet of pipe. I'm going to put a stop valve and also T off to a spigot just for future use. Aside from that, is there anything I can do to help her, or is it time for a plumber?

The only idea I have is, once I have the shut off and spigot in, would be to close the stop valve, open the spigot, and try blowing compressed air (50 or so psi) backwards from the house to the spigot. Would that be worth trying?

OK. Worse than I thought. The pipe going to the house is, as far as I can see, old buried galvanized. I have attached a couple of pics for your enjoyment.

All new pipe or PVC looks like the future.

Yeah. That's what I am afraid of.

See this as a good thing, because old stuff has to be replaced at some point with better stuff. Maintenance and failures are never convenient as far as timing, and money are concerned, while you are in the middle of it, but it sure feels good when it's over, and the job gets done right.

I bet they got quite a few years of good service out of this system... decades even. No doubt they can look forward to a few more decades when it's over.

Yeah. You are correct on that. Just part of the maintenance that has to be done if you own a house. Still, I hate to see her having to spend that kind of money.

The easiest way forward is a temporary line to supply water to the house. No need to bury it at this time, until a clear plan can be made for a permanent solution. How many feet of HOSE would that take? (Local laws apply)

75 feet or so to the house. Problem is that the house is on a slab. How would you hook it up? I thought about running a water hose to the nearest outside spigot and getting water in that way.

Anyway, I think she had a plumber over and he told her the line needs to be replaced. I am assuming that will happen shortly.

Final resolution. Plumbers came out and trenched to house. Ran new 3/4" pex to the house. Said the old pipe was galvanized.