Four connect reversing valve is suitable for hot pump type air conditioner system, such as: the central, unit and room air condition, etc., it is used for switching over circulation route of refrigeration working medium, in order to achieve the purpose of refrigeration and heat. Series four connect valve that produced in our factory can meet the auxiliary demands of hot pump type air conditioner system, of which the compressor power is 0.75-8HP and suitable refrigeration working medium is R22、R407C、R410A, and so on.