Only 1-ply toilet paper is suitable for use in our RVs.This breaks down quicker than 2 and 3 ply paper and doesn't clog the sewage system.1-ply toilet paper is available from RV supply stores and some supermarkets.It is also sold at CanaDream locations. Please note that Guests are responsible for the cost of clearing clogged tanks where the incorrect toilet paper has been used.