Increased comfort Even temperatures Cleaner air Decorating freedom Energy efficiency Pre-assembled Stainless manifold is to be used in closed loop hydronic heating, cooling and snow melting systems These Pre-assembled 1-1/4 inch diameter stainless supply and return manifolds come attached to two 6-5/8 inch spacing brackets for Compact design remote mounting This stainless manifold provides shut-off and balancing valves with flow meters for each circuit Each flow meter/balancing valve allows graduated flow setting up to 2 gpm, maximum 18 gpm per manifold The air bleeder and purge valves are connected and factory tested Air bleeder model 2878.914, bracket model 2878.912, purge valve model 2878.915, supply flow meter valve model 2878.920, supply shutoff balancing valve model 2878.924