Michaela521
Member
My drainage system is on a septic system. How do I find out where the drain pipe runs under my slab of concrete. At one end of the house the drain pipe goes down into the concrete. The septic tank is located on the other side of the house (backyard) where it is annually drained though a pvc pipe that comes up though the ground. Can I assume that the drain pipe runs straight under the concrete from the place where it enters into the concrete to the place where it comes up out of the ground in the backyard. Not everything is perfectly in a straight line but there are fixtures like sinks tubs and toilets thoughout the house that have there own drain pipe or share a drain pipe that runs into the concrete that connect to this straight main pipe under the slab or hopefully it is straight and not snaking around under there. Also, doesn't this drain pipe need to be below frostline from the point it starts from the house since it doesn't have the heat from the house. Thanks for all the help.