Firstly, toilets do not work on suction. When the handle is pushed, the flapper opens and allows the water in the tank to flow to the bowl. If the flapper does not stay open long enough to allow most of the water to flow out, weak flush occurs. After the water leaves the tank, it enters the bowl rim and goes into the bowl through small holes placed around the perimeter of the rim. If these holes are clogged by mineral deposits, weak flush occurs. When the water level in the bowl is sufficient, it flows through the trap and out the discharge hole and into the sewer lines. If the trap or discharge hole is clogged, weak flush occurs. The last thing that can cause the flow to be disrupted is a clogged ventpipe. This pipe allows air into the drainage system (which is needed to operate correctly) and if this pipe is clogged, it restricts the airflow and "airlocks" the drain. Power flush toilets are expensive and hard to repair when not working properly. People who think they need a toilet that will flush 16 golf balls, actually need a Doctor, not a Plumber.