Quick view JR Smith 7012S04 4" Cast Iron Sewer Backwater Valve JR Smith MSRP: Now: $652.46 Was: Used in main or branch sewer lines to protect basements and low areas against backflow from the street sewers. Valve design permits access to backwater valve assembly, for servicing or cleaning... JRS7012S04 MSRP: Now: $652.46 Was: Quick view Qty in Cart: 0 Price: MSRP: Now: $652.46 Was: Subtotal: