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Thought I would share the final remedy with you regarding the initial problem of not being able to get DHW and CH on at the same time. As a last resort I bought a Grundfos 15-60 Super Selectric off ebay at less than half the list price and decided to fit it last night. Much to my surprise the...

Is there a one which has 3 ports of 28mms with a D shaped spindle which would fit into the D shaped female end on the actuator. Can I obtain a 28 to 22mms connector easily. I am only a novice remember.

Have just taken the valve apart ie removed the spindle with the carbon/ graphite paddle and discovered it was not seated on the spring loaded pin properly. How it never fell thro' one of the 28mms ports I'll never know. Is there a suitable replacement valve body which takes a Sunvic dm 5651...

Help!! Just replaced the actuator on a Sunvic DM 5651 which appears to be working OK can here the micro switches clicking on and off Reason for replacing is that I can get DHW separately and can get CH separately BUT when set programmer for both only the water comes on no heat to radiators...