Sioux Chief 869 series ProCheck backwater valves shall be used where necessary
in drainage systems. Backwater valve shall be installed in horizontal drainage lines
to reduce or prevent damage to dwelling from sewage backup. Backwater valve
shall have a stepped design to provide adequate fall through the valve body and
encourage flow. Flapper shall install into valve body via removable carrier, which
utilizes key-to-slot to ensure proper alignment. Flapper shall have a permanent,
one-piece sealing surface, and allow unrestricted, unidirectional flow. Valve body
shall be sealed by an impact/solvent resistant lid with o-ring. Backwater valve
shall be adaptable to either shallow or deep-bury installations and be designed in
accordance with ASME A112.14.1-2003