... .This system can be used for seperated pressure solar water heater.Insulation:35mm polyurethane foam and 25mm aluminum silicatesupport ... -purity copper systemstyle:15/20/24/30 tubesWork station:instrument,expansion vessel,circulating pump,relife valveModel: JJR ... ,150L,200L,250L,300L,400L,500LHeat collector working temperture: -35-200Electrical heater: 45-65hotwater temperature: 50-75Pressure-endure ...