GPA II CV&AUTO series motor pump is mainly applied to home heating and water circulation in domestic hot water system. The best system met GPA Series circulator pump, following: ·the constant and variable flow heat system ·the heat system of variable flow heat system ·the air-conditioning system ·the industrial circulation system ·the home heating and living water system GPA II CV&AUTO series motor pump has the permanent magnet motor and the different pressure controller, which can continuously adjust pump performance to meet actual requirements of the system.