Saniplus pump sounds like a jackhammer
I'm glad you asked today, and not 3 months ago!
We also have this model, and ours is hooked to a septic tank, and with a whole lot of trouble, I believe we have your answer.
It is: Toilet paper.
You can pull up the Sani-flush people on line, and they will help you disassemble your unit and clean it. You should find it bound up with a big wad of toilet paper. The newer toilet papers, particularly the softer/gentler/stronger ones, are more glue than paper, and will clog up everything. After our latest go-around a few months ago, we had to go to some stores and buy an assortment of toilet papers, and put samples in glass jars with water, and shake them, to see which would disintegrate, and which stayed together. Because of this, sounds like you will find this the problem. Best not push the motor, or it may burn up, and be quite expensive to fix.
Be blessed, Read More At : & Saniplus& Macerator Pump...