These replacement valve pins are designed for compatible underfloor heating manifold return bars, restoring reliable opening and closing of an individual UFH circuit where the existing valve mechanism has become worn, damaged or difficult to operate. The standard M30 actuator connection allows the valve to be controlled manually with a suitable cap or automatically using a compatible 230V actuator head, 24V actuator head or AmbiEgo® self-balancing actuator. Manufactured from stainless steel for durability and corrosion resistance, the valve pins feature a simple screw-in design for straightforward manifold maintenance. They are suitable for compatible UFH return bars, including the return bar used on the Ambiente 413 Series stainless steel manifold. Always check the existing valve connection and dimensions before ordering.