Changzhou WanGao energy technology Co.,ltd. is specialized in produce pressure water tank products from 2006, approved by ISO9001 quality system, the European Union solar keymark certification, CE and Chinese market CCC certification.Company supply OEM & ODM service for all customers, Our heat pump buffer tank, pressure stainless steel coil tank, copper coil pressure tank, heat pump hot water tank, separated pressure solar system tank etc., exported to Germany, Poland, Australia,Singapore etc., more than 30 countries.We have advanced butt welding machine , laser cutting machine, automatic straight and connector welding machine. Automatic air pressure testing machine. Each tank will be tested by our air pump testing machine under 10 Bar pressure. These equipment give us stability products quality and long working life.Customer requirements is the cornerstone for we constantly raise; Customer satisfaction is our biggest success.