I have richdel valve R204LGP and it is installed below the ground level in a small box. When i start the sprinkler the box is getting filled with water and it seems there is a leak in the value. i started to dig and removed the box and mud and now i could see the 6 valves and lot of cables. There is a water inflow to the valves and the other end has a metal water stopper with a wheel which could be used to stop and start water. Can I find any manuals for the above model and also I would like to know how to replace the water stopper and my guess is that is what causing the leaking problem. Thanks. Sai