... .Anti-freeze 3.Guarantee:6years 4.Deliver time:10days Galvanized Water Pressure TankFeatures: 1) Reliable and efficient twin-glass solar tubes; 2 ... set)2) Consist of solar collector, water tank/boiler, circulation pump, expansion evessel, controller,flowing meter,pressure gauge3) Capacity: 150L,200L,250L,300L ...