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Description: This DN20 angle valve is suitable for electric water heater, it has check valve and relief valve function which can prevent the water from backflowing. It has non-return backflow, safety pressure relief, drainage cleaning function, etc. When the pressure is high, it can drain excess pressure to ensure the life of the liner and avoid the occurrence of a blast accident. Made of high quality brass, durable to use. Specification: Condition: 100% Brand New Material: Brass Model: DN20 Weight: Approx. 230g / 8.1oz Size: Approx. 88 × 55mm / 3.5 × 2.2in Package List: 1 × Angle Valve