A Compression 28mm Red Handle T-Bar Butterfly Valve is a valve used to control the flow of fluids in plumbing systems. It has a 28mm compression fitting, allowing easy installation onto pipes without welding or soldering. The valve features a red T-bar handle, which is used to manually open or close the valve by rotating the handle. The butterfly mechanism inside consists of a disc that pivots to regulate the flow of the fluid. This type of valve is commonly used in larger residential or commercial plumbing applications where a 28mm pipe size is needed, providing efficient and reliable flow control.