Quote:
Originally Posted by Whimsey
Had the same problem, but it wasn't the toilet. There is a filter between the holding tank and the leach field that can clog and slow drainage. I had no idea. There was a second access cover buried in the flower beds that I didn't know was there and the filter was under there. Pull it out slowly until the water level falls below the exit and then wash it off with a hose and reinstall.
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My system has no such filter. I have a 2000 gal holding tank and then a 500 gallon pump chamber before th pump-out to the d-box. Have a clean-out on the main line just before it enters the septic holding tank and absolutely no backup. All is flowing as designed. And no filter anywhere. My system was installed in 2005 and met all state regulations/inspections. No issues ever.