Material: Brass body, the check valve is made of high quality brass and stainless steel spring, which has the highest durability, corrosion resistance and airtightness, and can withstand high temperatures and high pressures. Features: The check valve group is used on the water suction pipe or water pump to prevent water from flowing back into the well after the water pump is turned off, thus preventing unnecessary backflow. Design: The water shut-off valve has an internal thread in the direction of flow. The valve has a sturdy brass flap that is guided by a brass guide pin, which ensures a good seal and minimal wear on the guide pin. EASY TO INSTALL APPLICATION: Just a few turns and screw in our waterproof check valve. Application: For water pumps, fountains, washing machines, gardens, rain barrels, buckets. For suction on the pump to prevent backflow. Product description Whether on the washing machine at home or outside in the garden, the possible uses are diverse: pumps, rain