... water heater is composed by heat collector, storage tank, electric control device, hot water mix unit and ... fittings for circulation and installationSpecifications:Water tank (interior): SUS304-2B food grade stainless steelModule: PVDFManifold ... 58mm diameter, 1800mm lengthworking station: controller, Circulation pump, expansion tank 5L-8L, manometer, flow-meter, pressure relief valve, ...