A check valve, also known as a non-return valve, is a device in the water system. It serves to control the flow of water in one direction, preventing the water from flowing back when the pump stops working. Used to install in conjunction with a water pump. This prevents water from flowing back into the pump when the water is not turned on. If the water flows back into the pump, it will cause the system to malfunction. leading to improper service life. In general, there are 3 types of check valves that are commonly used in Thailand: spring check valves. swing check valve and spring foot valve

Also known as a non-return valve, it is a device to seal the pipe connection used to control the flow direction and flow rate of water, gas or liquid to flow in the same direction.

In general, check valves that are commonly used are divided into two types, one with a swing stop. and stop with lifting Both of these are made of plastic material, stainless steel or brass stamping with good corrosion resistance, rust-proof, and similar performance characteristics where water, gas or liquid will flow into the valve in the direction of the valve. Single and mechanical valves will automatically turn on-off when the water pump stops working to prevent backflow. waterproofing and also prevent damage to the device as well