... in storage for cold water,pure water,hot water,chemicals and solvents,etc.Function:Hermetically sealed with water inflow, outflow, overflow ... manhole, anti-poisoning locking device, to protect water sources from secondary pollution, and it is the ... 9001:2008 WCS Certification, UKAS 060Q0201393 Scope: Production of water treatment equipments, automatic vending machine, environmental product, sales ...