SylvanLMP
If you have a BIG OLE Tank you can adjust your lift rod which is attached to the tank bulb that is attached to the over flow tube by way of a guide rod holder.
All you do is raise the thingy attached (CAREFULLY) to the over flow tube that is attached to your Douglas valve to allow a longer SINGLE flush.
You could also opt to remove the lift rod, guide rod assembly and the tank bulb and install a good quality Hunter Flapper and adjust accordingly.
