Water tank: imported high quality food grade stainless steel plate USU304-2B solar hot water system development, non-toxic and tasteless solar hot water system parameters to ensure quality and safety of solar hot water systems, pollution-free. Medium cycle start fast, and anti-cold, more suitable for cold regions. Solar hot water systems offer, Qingdao Steel Yi (certified), solar hot water systems supplied by Solar Co., Ltd. Qingdao Yi Gang. Qingdao Yi Steel Solar Limited (www.gangyisolar.com) is Qingdao, a leader in solar and renewable energy, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Yi Gang leader in Qingdao with the staff warmly welcome all inquiries negotiations to create Qingdao Yi Gang a better future.