Drip Irrigation New Installed

On the 2nd June 2009, I bought the PVC pipes and fittings to install the Irrigation system for my garden. Cost for this system about Ringgit Malaysia Fifty all together. The timer I bought not function for 2-5 minutes run time. It was 15 minutes minimum and its not work for irrigation system with small water storage tank. I need to change a digital timer to make this system perfect and some modification at the storage tank. Below is the illustration how the pipes goes to the individuals polibags for chillies, long beans, and tomatoes plant.