We use the same septic service to pump our tank(s) as needed. We have lived here for twenty five years, they have pumped us out two or three times. They pumped the rental we owned when we bought it, and when we sold it. They also pumped the father-in-laws place a couple times over the years.
A couple things we learned from watching...
- Tenants don't follow the rules.

I was shocked, shocked I tell you. The contract clearly stated no feminine products were to be flushed. None, nada, no how, no way. When he popped the cover on the tank for the rental... a solid layer of them lay atop the scum layer.

Shocked. If she hadn't already been evicted...
- The fragile foam, scum layer can support weight. Our guy got a call regarding a large heirloom ruby ring accidentally dropped and flushed. Popped the top, there it was on the top of the scum layer. He carries a long handled retrieval net, but you get just one quick shot. Position the net then push it right under the target. Touching the layer causes it to collapse. Anything that doesn't float, sinks. He rescued the ring, and many other items, but has missed a rolex and an antique pocket watch. Unlike the folks on BONES he won't don a hazmat suit and climb in the pumped out tank for your lost items.