oncrete chambers are designed to store effluent discharged from a septic tank. These chambers are rectangular-shaped devices either 4'x8' or 4'x10',  which have four sidewalls and a top, but no bottom.  ( both manufactured here at Genest Precast) Concrete chambers are quite strong and durable and are relatively heavy, requiring a lift truck (our job here at Genest Precast) to set them in place. The chambers are installed by either using  trench or cluster configurations.   Effluent then infiltrates into the soil beneath them.  The chambers can also allow effluent absorption through sidewall areas, but only when installed in trenches with stone applied to both sidewall areas. These devices must meet the same sitting requirements as stone beds.  They must be installed per manufacturer's instructions.