I do not have Liquivac. I cannot say anything about it. But I bought six Topsiders within a 2 month period when it was on sale. It worked great for me but some of my friends had problem using it. The problem was the pump cylinder which will come loose or off if the operator is pumping in a wrong angle. The pump is mounted to the can at about 80 degree. For some people, it needs practice to get the job done right.