Smith-Blair Style 226 7 1 2" Backwater Drainage Valve

Smith-Blair Style 226 7 1/2" Backwater Drainage Valve is a backflow prevention device from Smith-Blair that protects against sewer backup in drainage systems. The Style 226 designation identifies this specific valve model, intended for installations where backwater protection is required. It is designed to prevent wastewater from backing up into the building while allowing normal flow to continue during standard operation. When backflow conditions occur, the valve blocks reverse flow to safeguard interior plumbing and fixtures, and it returns to forward operation once pressure normalizes. This backwater valve is used in a range of drainage installations to protect living spaces from sewer backflow during surge conditions and to safeguard fixtures. Regular inspection and cleaning can help ensure reliable performance, as debris can affect operation over time. The unit should be installed in accordance with local plumbing codes and manufacturer guidelines.