County sewer officials are urging homebound, toilet paper-strapped residents to think twice before flushing other materials down their commodes.

That goes for paper towels, tissues, napkins and the bane of many sewer systems, supposedly flushable wipes.

“They are not flushable, and they are not biodegradable,” said Stephen Renner, director of the Franklin County Department of Sanitary Engineering. “They wreak havoc in our system. ... Please don’t flush those down the toilet.”