we just moved into a new home. one of the valves on our sprinkler system is not working. my husband has tried to get it going both with the control box and by turning it on manually. we can hear a faint water running sound but the pressure is not enough to get water to come out of the heads. the valve is a Toro pro flow (i think that is name) and I have read here doing a search that they are junk. I was told by the previous owner that it is about 12-15 years old. my question is what do you pros think the problem is. Is it fixable? If so how? If we have to replace the valve does anyone know where a person can get detailed instruction. we live about 40 miles from the closest town with a service place so we trying to fix it ourself since having to get it done would be extremely costly with travel etc. for such a small repair. thanks.