Flow test

I’m new to the inspection of wells. My question is there a time its to cold to do a flow test.

You can do the flow test from inside the home as well. There is usually a spigot after the pressure tank. I do all of mine that way in the winter months

Or you describing a “flow” test or a pressure test?

In the winter I will run the water in the tub. I can check for leaks in the system at the same time.

You can do both from the same spigot actually. It takes me 2 hours to do a flow test so fairly convenient when it is in the house. Once the flow test is done I can throw on my pressure gauge and check that as well.