From the TOH Online Editor Inbox, Dianna P. asks:
"My husband and I purchased a split ranch style house as a work in progress. One of the problems we have found are the toilets. The house was built in 1985. It has a well and its own septic system. The issue is that when you flush the toilet, you have to flush it 2 to 3 times. Both toilets are on the main floor and the baths are back to back with each other. Different people have said it may be different minerals built up in the systems, not allowing the water to flow into the tank. Others say it could be the size of the piping the water flows out of. The pipes downstairs say they are 3". I have been told they should be 4". Would that cause the problem?"