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Made of high quality brass, resistant to oil and corrosion,can discharge sewage and gas, environmentally friendly and durable. Used to check the control valve to prevent water, gas, oil backflow,excellent replacement for the old or broken check valve. Our non-return valve can be connected to all pipes, hoses and connections with 1 inch external thread in accordance with BSP. Easy to use, installed horizontally during installation, with just a few turns, you screw our non-return check valve., Manufacturer: Create idea