Toilets that are not compatible with a septic tank, or that are not properly installed, can cause blockages in the pipes. The limited amount of water used in low flush toilets can also reduce the amount of water that is removed from the septic tank during normal cycles.

Here are a few ways low-flow toilets can cause clogs and how to prevent them. Low Flush Strength Less water going down the pipe means less pressure pushing the waste down it. With less pressure behind it, the waste may move slowly or stop entirely in the pipe, creating blockage and backup.

If you live in an older home, you may have low-flow toilets. This could be the cause of your blocked toilet. Most older model toilets don’t have the pressure needed to push material through the drain. Low flushing power keeps material from fully flushing and results in a continually clogged toilet.