... your house.Components for split pressure solar water heater: This system is composed by solar collector, solar water tank(solar boiler),solar workstation(including intelligent controller, expansion tank ... )Coupling pipeSUS304 stainless steelSolar collector size15 tubes,18 tubes,20 tubes,25 tubes,30 tubesTube typeBorosilicate glass 3.3 vacuum tube with copper heat pipeTube ...