Flushing cistern

[Burt]

I have just installed a pneumatic dual flush cistern with a quiet ballvalve. Only problem is the cistern is constinually filling up and water is running into the pan. (When I say fill up it never really gets a chance to as the water is runningout of the flush bend into the pan. Anyone any ideas why, or how to solve the problem?

[kevplumb]

check the water level ,most of the new cisterns have a built in overflow

other thing is the flush valve seating correctly

__________________
a little thanks

goes a long way