pulmonary tuberculosis is the most common form of tuberculosis bacteria that cause tuberculosis could also spread from the lungs to other parts of the body through blood or the lymph fluid an active tb disease of the lungs airways or larynx is considered to be highly contagious
Before extrusion, the HDPE can be pigmented to yield color-coded pipe. Common PEX tubing colors are natural (hazy clear, unpigmented), white, black, red and blue. The red and blue colors are used to help plumbers and homeowners distinguish between hot and cold water supply lines.
AquaPEX tubing is the only PEX-a tubing available for plumbing systems, and is the only tubing that can be used with the ProPEX expander system. The other major manufacturers such as Watts, Viega, and HydroPEX are PEX-b products.