See all products of Spare parts for distribution manifolds Return manifold. 11/4'' connections. Flow manifold. 11/4'' connections. Pair of distribution manifolds. 11/4'' connections. Off-centre by-pass kit with fixed setting. Pair of ball shut-off valves. Pair of ball shut-off valves. Flow end fitting. Return end fitting. Reduction fitting. Compression fitting. Automatic air vent with hygroscopic cap. Pair of mounting brackets for distribution manifolds 663 and 668...S1 series.