... Pressurized type .Solar Keymark, SRCC, CE .OEM available .Heat pipe 58-1800, 70-1800 SpecificationsSplit solar water heater .Pressurized type ... .Solar Keymark, SRCC, CE .OEM available .Heat pipe 58-1800, 70-18001. Reliable and efficient twin-glass ... solar tubes2. Copper heat pipes for rapid heat transfer3. Easy plug-in installation4. Free maintenance5 ...