We have a rural septic system. I recently noticed toilet paper & sewage coming out the vent between house and first holding tank. Pipe from house is very old metal. Should I treat as a clog first and then suspect broken pipe? Order of items along sewage line:Vent, manhole 1 has 8" diameter plug, manhole 2- tank with baffle, main septic tank, drain field. Getting 9" of snow today.Help!
