... double valves: 1.Scientific design 2.ISO9001,CE approved 3.Long service life 4.Fast delivery 1.Brief introduction♦ Product name:Water ... manifold with double valves♦ Raw material:DZR,CW617,CZ132,C37700,CW614N,Hpb58 ... at your service in 24 hours! 2012 Popular DH1''G1620 water manifold with double valves for underfloor heating