I shut the water main off to my house while doing some work. When I turned the valve back on there was no water. I turned it on and off a few times and the water started to flow. The problem is that now I have much lower pressure than before. I am assuming that the valve is only partly open. Please give advise. Are there any tricks to get that valve to fully open without having to shut off the water at the meter and replacing the main valve? Would heating the valve/pipe help?
I assume the pressure is there but not the volume. Is the volume low everywhere or just certain places? If it is at certain sinks only you may just have debris in the sink aerators. If you have the water flowing and turn the valve you should be able to ascertain if the valve is opening and closing. I would think if the valve was broken the valve would not change at all when turned.