1st the problem...

First there was no water pressure. I had a well company come out and they replaced the pump switch and everything seemed to work fine. This was just a few days ago.

Now the water pressure in house goes up and down.

There is a new pressure tank and with the well off and the water run through the lines, the tank pressure is 38 psi.

When running the water at any fixture, the pressure is good, but only for about 30-60 seconds then it slow to almost nothing.

It was suggested that there may be dirt in clogging the faucets after a recent well/water test. I can't believe they all clog at the same time as is what happens. When the pressure is good, it's good at all fixtures, but when it slows it slows at all as well.

The only thing I can think of is a new pump, unless anyone has another suggestion. If it is the pump (submersable one) can I install that myself?

Thanks

Brian WI