This is a vent that prevents water pumps from effectively preventing problems and should not be blocked! hole, on the side of the solar water heater tank, remove the water tank cover, remove the polyethylene foam insulation layer, and place the stainless steel liner directly on the hole. First, directly weld the faucet after the hole. Second, use it. high temperature resistant sealant to seal the threaded hole. Third, foaming agent, filling the insulation layer. Otherwise, it is not recommended to open it. First, the openings are not sealed well and it is easy to leak. Second, the corrosion resistance is not good. Third, the insulation layer is damaged and the thermal insulation effect is not good.
National standard: 5.5 cm. If you buy a relatively high-end product, it is 6 cm.
There are more than 5,000 energy factoriessolar in China and there are more than 20 famous brands (with scientific research capabilities). Be careful not to buy (which type of sunshine, such as Hisense Sunshine, Gree Sunshine), is the most wrong
The method of obtaining the hole distance is: measure the circular pipes, generally from the middle of the pipe to the middle of the pipe, please adopt it.