Signs of system distress include:
Gurgling sounds in your plumbing Toilets and sinks draining slowly
System backups
Black or gray water coming from your home’s outlet tile discharging into a creek or ditchCertain areas of the yard are wet, possibly with standing black or gray water
Foul sewage odors noticed in the house or outside *BE SAFE: If odor is present you should immediately take appropriate safety measures to eliminate propane or gas leaks as the cause