LK 435 OptiFlow, 4-36 l/min I Underfloor Heating Flow Balancing ValveLK 435 OptiFlow, 4 36 l minis a group valve for adjusting flow in, for example, underfloor heating systems, traditional heating systems, and cooling systems. The adjustment valve has 1 male thread on the inlet and 1 female thread on the outlet. The male thread is supplemented with an LK Joint Nipple with loose nut for simple assembly to, for example, LK Manifold RF for underfloor heating. Adjustment is performed easily using an Allen key, while the