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
|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