txdon
Super Star Member
When was the last time the tank was pumped out. They do fill up in 5 to 20 years depending on type/size/usage, and when they do the sludge goes into the line and the system fails and backs up. Thats what happen to my Dads (emergency pump out and line replacement during Christmas)- after he bragged about never having to pump it out. I get mine pump mine out every 5 years and it is just about full.