steamup wrote:Bottom line,
If your tank is working properly, chemicals are a waste of money.
If your tank isn't working properly, chemicals won't fix it.
3 years on pumping is a safe number.
Since I have a 1500 gallon tank and heading for an empty nest, I plan to pump every 5 years.
dll wrote:Grease floats, sludge, depending upon it's specific gravity, will sink or float.
My system is all new and my installing contractor also maintains (pumps) the systems he installs.
He has an interesting system for pumping out septic tanks, his pumping truck has two tanks. Upon arrival at the site they pump out all the affluent in the middle of the tank that contains the working bacteria into the truck, this is the working liquid between the floating material at the top and he sinking material at the bottom. Then they pump out the sinking/floating materials into another holding tank and then pump the middle affluent back into the tank. Overall the disposal cost is lower (this is passed on to the customer) because they have less material to take to the disposal processing station.