complate nonpressurized vacuum tubes solar hot water system1.Tube Size:58*1800
2.Outer tank diameter:480,500
complate nonpressurized vacuum tubes solar hot water system
Tube Size:58*1800
Outer tank diameter:480,500
Inter tank diameter:470,490
Tube quantity: 10, 12, 15, 18, 21, 24, 30, 36 pieces
Assistant tank capacity: 80 to 120L
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