In 2016 Jabsco upgraded the Lite Flush drive pulleys from plastic to aluminium, this change means the pulleys do not have to be replaced due to damage.
Only marine grade toilet paper and human waste should go through the toilet, other materials such as wet wipes or sanitary products can block and may damage the drive belt, this is not covered by warranty. Should this occur, you can now purchase a replacement belt service kit comprising of one belt and fitting instructions.