I am looking to alter my heating system from using a SD 2701 (for which I have a few spare heads), to a system using a Sunvic SDM 1901 three port valve head/ actuator. I am well accustomed to the these heads suffering failures, hence my keeping spares for the 2701 and repairing them as necessary.
So I am now looking for some surplus to needs Sunvic SDM 1901 heads, faulty or working, to repair up as spares please. Obviously I don't want any seriously water damaged, or blasted ones. Happy to pay postage, plus a couple of beer tokens.