, the purchase of stainless steel water tank must allow the seller to indicate the solar water heater product material, and allowed to issue a material certificate and guarantee (stainless steel experts, senior economist, Hao Pei Gang says, the community spread by "magnetic" or "non-magnetic" to identify the genuineness of the stainless steel water tank, but this method is not reliable. Because now a lot of high-level stainless steel water tank product is magnetic and currently on the market has a lot of fake and shoddy stainless steel products can do without magnetic "so be sure to allow the seller to indicate the product material, and let the issue material certificate and letter of guarantee) scientific sampling samples (not specified by the manufacturer) the relevant departments of the local detection is a necessary means. To prevent economic losses and to give the project a huge potential risk.

Two, the stainless steel water tank with a magnet to touch, to see whether the magnet. If there is no special note, under normal circumstances is not a magnetic suction if the magnetic absorption is likely to use low-grade ferrite materials (such as 430 instead of.

Three, only use the magnetic to judge the quality of stainless steel, not scientific concept of the wrong. This concept is leading to the market low nickel and low chromium but not magnetic stainless steel 310-311 jumping well, deceive the user, use a very short period of time the corrosion, fracture and drum up (has occurred several) one of the reasons.