I uncovered the main waste line from the house to the septic tank and found that it was crushed beneath some very large rocks. I've removed the rocks, cut the new pipe and and am ready to install, but want to know how to avoid having this happen again. Should I make a bed of gravel/stone for the new pipe to rest on and then cover it all with dirt? Is there a standard practice to follow? (I can't seem to find this info when reviewing "septic designs" and other such topics.) All advice appreciated!

Hi, I hope this is the right forum to post this. I have a Flood control lift station for my 3 flat apartment building and it accumulates a lot of grease in it and don't know how or why. I've gone through 2 ejector pumps and replaced 4 diaphragm switches because of the loads of caked on grease on them. What can I do to eliminate the grease or at least control it down to a minimum? Is there some chemical or some detergent that can emulsify grease quickly and not harm the pump in the process? Reason I say "quickly" is because there's never any standing sewage water in the pit because it's immediately pumped out. I'm sort of regretting installing this flood control system because of the expensive maintenance and the pump working 365 days a year.......ugh!!! Thanks again...:)