The use of a relief valve such as the Watts 530C, BRV, Governor 80, or 3L or potable water expansion tank such as the Watts DET, PLT, ILT or DETA may be required.

• 此时可能需要采用安全阀，如美国瓦茨530C,BRV,Governor80,或3L，或者饮用水膨胀罐，如美国瓦茨DET,PLT,ILT或DETA。