1. This product shall not be used in corrosive liquids on metals. 2. During installation, the pipe threads should be coated with a little magnetic oil and tightened to maintain the seal. Also want to note that (1) when the delivery of the hand pump is generally convenient for packaging not to be assembled, so users to buy the need to install their own, the first should distinguish between the import and export remember not to make a mistake. (2) when installing the inlet and outlet pipe, sealing should be done to prevent the air inlet from affecting the flow rate. (3) if for a long time do not need to add a little oil to lubricate it, but for edible oil exception.

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