Quote:
Originally Posted by fatlazyless
Satellite septic pump systems like yours always have a $25 check or flapper valve installed in the line just above the pump that keeps all the septic semi liquid waste from return flowing back downhill like a siphon drain.
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The septic installer drilled a hole in the flapper valve, so the water would slowly drain out of the pipe between the holding tank and the leach field. This is so that if we're gone for a few months in the winter, we don't end up with a pipe full of frozen effluent. We have the vent pipe both at the leach field and holding tank, but no odor in 12 years.