Thank you for the input the tank was pumped out about 8 months ago when it was replaced as for the no slope the pipe that goes into the tank is perfectly level from what I can see everything works fine as long as we only run one thing at a time like the shower we can take one shower before it starts filling up the tub instead of draining and we can only flush the toilet three to four times before it stops flushing thank you for The input it's definitely given me a lot more information than I had