Direct-plug non-pressurized solar water heater system contains the non-pressurized
water tank, all-glass vacuum tube, and some supported frame.
Features:
1) Material of water tank: stainless steel plate / 0.5 (SUS304-2B food grade)
imported aluminum zinc steel / 0.4
2) Tube: all glass vacuum tube (SP-TG47 and SP-TG58)
3) Material of supported frame: stainless structural steel / 1.2
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