See all products of Standard manifolds for central heating system Manifold for heating and cooling systems. 2 outlets. Manifold for heating and cooling systems. 2+1 outlets. Manifold for heating and cooling systems. 3 outlets. Manifold for heating and cooling systems. 3+1 outlets. Manifold for heating and cooling systems. 4 outlets. Insulation for manifolds for central heating system 550 series. Kit for 550 series manifold pipe connection to 548 series hydraulic separator. Pair of plugs with gaskets for unused outlets. Pair of fittings with gaskets.