ALFA radiant heating system provide a central control for hot and cold water that feeds flexible PEX supply lines to individual fixtures. Brass manifold plumbing compared to rigid pipe plumbing systems, using this radiant floor heating systems is cheaper because of its size and ability to control many different zones from one place. Our radiant PEX manifold allows you to monitor the water's temperature and flow rate, set up automatic flow controls, drain the system, and more. This particular radiant hot water system is made of brass 57-3, has nickel-plating on the ball valve and air vent valve, and has 1" supply/return ports and 1/2" branch ports (can be converted to 3/4" by using adapters). It includes automatic air vent, shut-off valve, drain valves with outlet caps, temperature gauge, flow valve, balancing valve/manual wheel for supply and return trunks. Its nickeled brass material are higher thermal conductivity, faster heating and insertion into plastic pipes than stainless steel ones.