1. Choosing the right amount of pure water and commercial water purifier according to the daily water demand, the first thing to consider is the matching of daily water consumption. I first counted the daily water consumption in the store, which is generally around 2 tons. If the amount of purified water is too small, such as 1 ton, it is definitely not enough; But if you choose too much clean water, such as more than 5 tons, it will cause waste. After comparison, I finally chose a commercial water purifier that can treat 3 tons of water a day. The daily processing capacity is higher than my actual water consumption, which can cope with sudden demand; But it won't be too advanced and it won't waste resources. Matching the daily processing capacity can not only meet the water demand in the store, but also avoid choosing an over-configured water purifier. When choosing a commercial water purifier, you must choose a product with suitable water purification effect according to the actual daily water consumption. 2. Pay attention to whether there are professional installation and debugging services. The installation and debugging of commercial water purifier is very professional and complicated. This must be noted. If the installation and debugging are improper, the water purifier can not be used normally, which will cause losses to the merchants. I bought this brand of commercial water purifier. The manufacturer provides professional installation services free of charge, and their installers perform professional operations such as equipment positioning, pipeline connection and debugging. The whole installation process took about 2 hours, and the installer was very professional, which ensured the correct pipe connection of the water purifier and the normal operation of the system. If I pretend to be myself, I will be at a loss. So I suggest that when you buy a commercial water purifier, you must find a brand that provides professional installation. Their experienced installers can ensure the correct installation and debugging of the water purifier and avoid equipment problems. This installation fee is generally free, but it can avoid a lot of unnecessary trouble. 3. Choose products of big brands, and the quality is more guaranteed. When choosing a commercial water purifier, I will only choose the products of big brands, because the quality inspection and core components of big brands are more trustworthy. This is directly related to the filtering effect and service life of the water purifier. Big brands have their own quality inspection centers, which can conduct comprehensive water quality inspection on products and ensure the reliability of core components such as filter elements and pipelines. And some unknown small brands may choose inferior filter elements and pipes, which will cause problems after a period of use. According to the test report provided by this big brand commercial water purifier, the removal rate of heavy metals, microorganisms and other indicators far exceeds the national standards, which makes me feel at ease. Its RO reverse osmosis membrane also adopts imported original membrane, with a service life of 5 years, which is very trustworthy. Therefore, I suggest that you must choose big brands when choosing commercial water purifiers, so that the product quality and core components will be more reliable and can be used safely for a long time. 4. Ask about the content of after-sales service and choose the brand with fast service. When purchasing a commercial water purifier, I think the response speed of after-sales service is also very important. Once there is a problem with the commercial water purifier, it needs to be repaired in time, otherwise it will affect the normal business of the merchant. So when choosing brands, I specifically asked about the after-sales service content and response time of several brands. Finally, the brand I choose provides on-site service within 4 hours, and the maintenance cost is open and transparent. I have asked several other brands, and their response time is more than 24 hours, and some of them are still unclear about the maintenance cost. Comparatively speaking, I think on-site service within 4 hours is the most suitable. Once there is a problem with the equipment, it can be solved within 4 hours, which will not seriously affect the business of the merchants. In addition, the clear maintenance cost also reassured me. Therefore, when choosing a commercial water purifier, you must ask about the after-sales service content and choose a brand with fast service response, so that the impact will be minimized when the equipment goes wrong. 5. Let the sales staff provide the product inspection report to understand the water purification effect. When purchasing a commercial water purifier, it is very important for the salesperson to provide a product inspection report, so as to clearly understand the specific water purification effect of this water purifier. Ask the salesperson about the test report of this water purifier when purchasing, and carefully check the removal rate of heavy metals, microorganisms, organic substances and other pollution indicators. The report shows that the removal rate of heavy metals such as cadmium, arsenic and mercury is much higher than the national standard, and the removal rate of bacteria is over 99%, which makes me feel at ease. If I don't look at the test report, I can't know exactly how effective this water purifier is. Therefore, I suggest that when you choose a commercial water purifier, you must ask the sales staff for the test report, so that you can have a clear understanding of the water purification effect and avoid buying products with poor purification effect. Reading the test report can also avoid being confused by the exaggerated propaganda of some dishonest businesses. Choosing a commercial water purifier depends not only on the price, but also on the service and quality. Only by comprehensive investigation and comparison can we select high-quality products with high cost performance.