By means of the H-piece valve type RLV-KB, every valve radiator with a centre distance between the connections of 50 mm can be blocked individually, e.g. in order to carry out trouble-free maintenance without affecting other parts of the system. H-piece valve type RLV-KB is nickel plated and is available in straight and angle versions. Special adapters ensure that the H-piece valve can be used both for radiators with an internal thread of G ½ and with an external thread of G ¾ . All adapters are selfsealing. RLV-KB is factory set fully open.