Sioux Chief 869-2P – 2 PVC Backwater Valve on Sale
$13.702 PVC Backwater Valve Threaded access seals hand-tight and allows for easy maintenance and inspection 6 backwater valve extensions – use 10 Sch. 40 pipe (not included) For GRAVITY FLOW applications only Do not install vertically UPC IAPMO listed  IEZJ411298