A check valve is a device that can prevent backflow from the stormwater system and sewage from backing up into your home. They are used in all kinds of stormwater systems. It is important to install them correctly so that you can avoid a number of health risks. The type of check valve you choose is dependent on the application. For example, if you are using a check valve to protect a basement toilet waste line, you should use a single check valve. You should also consider the installation of a backwater valve in your sewage pump station. These are commonly installed to prevent backup from septic or area flooding.
Normally closed check valves are the most common type of check valves. They open by allowing water to flow forward through them and then closing. These are most often used in sewage pumps and in wastewater treatment plants. In addition to preventing backflow, they can also prevent a reversal of the flow. You should make sure that they are installed in a place that is easily accessible and are easy to repair.
Rubber duckbill check valves are a good choice for most wastewater applications. They are durable and can handle abrasive slurries. They are also resistant to organic contamination. They are shaped like a duck’s beak and can be used for both Combined Sewer Overflows and for stormwater outfalls. They are available in both threaded and flanged connections.
Floating ball check valves are another option for backflow prevention. They can be installed in a vertical orientation only. The head should be at least 10 feet and the ball should be gravity seated to the proper vertical position. They can be used for both anti-flooding and air vent applications. The float will inflate if a backflow is detected. The ball will deflate when the backflow recedes.
When installing a check valve, you should make sure that storm drain check valve the flap gate is free of obstructions. You should also check the rubber seal and the hinge on the flap gate. If you don’t do these tasks, the valve will most likely fail. In addition, you should clean the flap gate and remove debris at least once a year.
If you are unsure about the type of check valve that is right for you, you should call a plumber for a professional assessment. Some insurance companies will require that you have a compliant anti-backflow system in your home. The installation of a check valve is a relatively simple process, though it can be messy. You should wear gloves when performing maintenance on the flap gate.
The cost of a backwater valve depends on the model that you choose. A typical price range is between $150 and $300. They can be purchased with or without hydraulic cushions to minimize the risk of slamming. Some are equipped with spring-assist closing.
In addition to preventing backflow, a backwater valve can help to prevent damage to your property. When a sewer backs up, you should not flush any items into the drain. This can cause significant health risks and it can also be an inconvenience during a flood.