Tight connection:the connection is tight and not easy to fall,ensuring complete prevention of leakage [Main material]:Brass [Product Appearance]:Brass Silver Plated [Working medium]:water.air [Connecting thread]:3/4 diameter about 25.4-25.8mm [Product advantages]:Our company uses advanced equipment and high-quality brass to develop a check valve with simple structure,easy installation,no noise,large flow,completely sealed (no dripping),economical and efficient.Let you spend less money to buy better products. The product has low opening pressure and low pressure loss.Suitable for installation on water heaters.This can prevent the water heater from being cut off in vain.It can also avoid the imbalance of hot and cold water pressure,which makes it difficult to adjust the water temperature,making your water safer and more comfortable! [Product use]:Check valve,also known as check valve,check valve or check valve,its function is to prevent the directional flow of water in the pipeline without backflow Baby description: It is suitable for automatic water supply of thermostatic faucet,sensor faucet,water heater,water tank,water tower,and tap water.Pouring water is strictly prohibited.