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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 |
The LSU AgCenter and the LSU College of Agriculture