Originally Posted by RohanG
Thank you for the response.
The tank is a twin chamber. Only one chamber got pumped. Is this normal practice?
I'm not certain. Until recently, I had a 500 gallon single chamber fiberglass tank. It was insufficient for the load for the house (it was installed back when the house was only one bedroom and now it is has three bedrooms). My new tank has two chambers, but it doesn't need to be drained for another couple years yet. I *think* that only the first chamber needs to be drained because it is designed to be the catcher for the solid wastes and floating muck. In my new tank there are baffles to block the crud at the bottom and the crud at the top from moving in to the second part of the tank. Its a filter of sorts. They are connected so draining the water from one will likely drain the water from the other chamber, but the hose should probably only need to be put down into one chamber. I could be wrong on this.
Btw, I'm hoping you won't need to have it replaced, but if you do, I created a thread on the process of getting a septic tank/field line installed based on my own experience: http://www.plumbingforums.com/forum/f11/how-add-replace-septic-sewage-system-5653/
Hopefully that is something you won't have to do anytime soon though.
Edit to add: Whenever you have your tank drained, I do recommend that you stand by and supervise to make sure they drain it completely and don't leave any solid waste. I had a guy who didn't drain it all the way and we were having to get it pumped every year but he wasn't taking the solids out. They backed up and clogged the system which broke the wax seals on the toilets and caused leaks that destroyed the floors. The floor in one bathroom collapsed underneath the toilet while someone was sitting on it. Fortunately a joist blocked it from dropping straight down, but it fell over and the floor was just destroyed. I'm still trying to repair the floor in another bathroom from the sewage backing up and flowing in to the house. It's not pretty at all.