Installing a Backflow Valve

Patricia Skinner  |  1/31/2007 7:40:47 AM

1 - Expose sewer line and mark sections to be removed.

3 - PVC flap valve installed in tile sewer line.

2 - Remove the marked section of sewer line.

4 - Flap valve with water flowing (normal operation).

Installing a Valve - Installation of any of these backflow valves in an existing sewer line is dirty work but not technically challenging.

Relative Cost of 4-inch Valves, not Including Installation

4" Valve Price
Flap Valve (PVC) $     60
Ball Valve (PVC) $   100
Gate Valve (Brass) $   300
Hydraulic gate or flap valve (brass or steel) $ 1,500

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