Marketing InformationSpecifically designed with every feature thoughtfully considered and rigorously tested. The M-8330 stainless steel manifold is designed for use in hydronic heating and cooling systems. Premium quality stainless steel supply header has built-in flow meters to optimize design efficiency. The return header has easy to actuate circuit isolation valves. All assembled parts have superior EPDM O-rings and seals. Each manifold is loosely pre-assembled for immediate mounting at the job site.