Can anyone tell me why my newly installed lawn sprinkler makes my water run down into my over flow tube in my toilet tank Only when the sprinklers are spraying water. Water doesn't run or leak at any other time... just started with installation of sprinkler system

Can anyone tell me why my newly installed lawn sprinkler makes my water run down into my over flow tube in my toilet tank Only when the sprinklers are spraying water. Water doesnt run or leak at any other time....just started with installation of sprinkler system
Your water level in the tank may be set too high. Set the level to 1/2" under the overflow tube. I've seen this happen before. When the sprinklers kick on it fluctuates the water pressure in the system and if the water in the tank's set too high it will over flow. Set the tank level and if there is still a problem click on back. Good luck, Tom

Your water level in the tank may be set too high. Set the level to 1/2" under the overflow tube. I've seen this happen before. When the sprinklers kick on it fluctuates the water pressure in the system and if the water in the tank's set too high it will over flow. Set the tank level and if there is still a problem click on back. Good luck, Tom
Tried lowering water level... still runs when I turn on my sprinklers... any more ideas... maybe a pressure problem?

Speedball is off for a few days but will return by Monday at the latest. Who installed the sprinkler system, they should have some responsibility to correct the issue.