"Basically, the only thing you should ever flush down a toilet is human waste (urine and feces) and toilet paper."
Here is a list of some things to keep out of the toilet (and sewage system):
Any
product labeled flushable (they are not truly flushable / they do not
dissolve and will not make it to the sewage treatment plant --- meaning
that they remain in the sewage pipes somewhere along the line & will
cause eventual clogs and sometimes even damage.
Also, do not flush:
disposable diapers
tampons and tampon applicators
sanitary napkins
cotton balls and swabs
mini or maxi
pads
condoms
cleaning wipes of any kind
facial tissue
bandages and bandage wrappings
automotive fluids
paint, solvents, sealants and thinners
poisons and hazardous waste
Unused Medications
Fats, Oils and Grease---
Grease
in sewer pipes causes sewer maintenance problems for property owners
and the city. Never pour grease in your sink drain and try to use your
garbage disposal less."