with thread M 30 x 1.5 for H-heads, lateral radiator connection from below, with flat seal, pipe centre distance 50 mm. With submerged pipe L = 290 mm, Ø = 11 mm. The radiator can be removed while the system is under pressure. The valve upper part can be changed by means of HERZ-Changefix H Tool. Pipe connections G 3/4 with cone. Pipe connection have to be ordered separately.