Doug Miller wrote:

"Pumped" means "pumped *out*". As in, pumping 500 gallons of s**t out of the
tank.

500?? That's mighty small. 1500 is code around here.

Just had mine pumped out after living here for 5 years. From what I
could tell by looking down in there, it could easily have gone another
5 years no problem. Only about 18" of sludge on the bottom, and maybe
8" of scum floating on top. The rest was liquid, just the way you want
it to be.