I have dealt with Weathermatic valves for many years and have found them to be excellent valves. They did have a problem with some M24E solenoids with water leakage causing shorting. However, they now have a valve solenoid called the S20P that I have found to be very reliable. If you need assistance with problem M24E solenoids you can contact Weathermatic at 1-888-4 The Pro and ask for their technical assistance. I have found them to be very responsive to product issues. They have a new product called the Smartline controller that actually monitors the weather and adjusts watering times to save water. Really a cool product! I have found information on that product at a site called www.smartline.com.