WENNO is a water supply and heating installations manufacturer and we have lots of experience in water supply "ball valve & pipe fittings" and heating installations manufacturing. The invention relates to a heating installation comprising a closed liquid circuit which is under pressure during operation, in which are incorporated a heating boiler in which heat is supplied to a liquid circulating in the circuit and heat-generating means such as radiators and convectors, further comprising a pressure-less liquid reservoir connectable by valve means to the circuit, which valve means are mechanical valve means controlled by the pressure in the circuit. We can provide the best in water along with timely delivery and flexible payments. Besides our products and services, we have the capability to install and repair a wide range of heating and cooling systems. We also offer services that include preventive maintenance programs.

Our products "ball valve & pipe fittings" have been exported to external market such as US, Britain and Australia. Our products are also well known in domestic, we follow constantly innovate new products "ball valve & pipe fittings" with high quality to meet the customers demand and market need. It recognizes a special obligation to further certain social causes, such as affirmative action and diversity to help make the world a better place to live and work. Now, our productions are in large categories, such as copper ball, Pipe Fitting, faucet, ball valve and all kinds of valves. All of our products "ball valve & pipe fittings" are with high quality, it is supported by our experience, wisdom, hard work, and advanced manufacturing technology and management.

Customers reward us a high reputation because of our products are in good quality and can last longer after service. We will treasure and develop the reputation in future. Your satisfaction is our command we will do our best to satisfy and fulfill your needs. May it be our privilege to continue to serve you better all the time.