... 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 ... tubes passively track the sun)9. The perfect solar collector for domestic solar water heater systems10. Ideal for commercial solar water heating applications SRCC,SOLAR KEYMARK heater pipe solar water heater system