Hi all, I have a single handle water valve for our laundry center. I have found that the cold water is a lot less forceful than the hot side. I noticed that there is a slot in the main body of each side. The hot side slot is turned to about 2-8 o'clock and the cold side slot is 12-6. I tried to turn the cold side slot with a leatherman screwdriver and it would not budge. If it is really adjustable I will try with a real screwdriver. Is it adjustable or should I think about having it replaced? I have attached a pic of a similar valve.