SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

I have a rain bird system with two zones. I replaced the diaphragm and the solenoid on zone B and when I open the valve the sprinklers do not turn off with the main control box. Zone A works fine and turns off and on from the timer and control box. I had just replaced the timer box within the past year and it worked fine at that time when I tested everything. This is a rental and when I found that the valve for zone B was turned off with a portable handle on the top of the solenoid; I proceeded to replace the solenoid and diaphragm and it still does not turn off. I ended up tightening up the solenoid valve again. Also, when it is on, the valve box fills with water. Any suggestions as to what I need to do next. (zone A is for the drip system and zone B is for the sprinklers out back) I appreciate any help. Thank you in advance.