Looking for a 3D printable adapter to convert an old Drayton TRV4 bayonet-clip radiator valve to M30×1.5 thread so I can fit a SONOFF TRVZB smart radiator head.
Specs needed:
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Input side: Drayton TRV4 bayonet collar (smooth bore, 3-4 clip slots) — photos attached
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Output side: M30×1.5 female thread (standard for smart TRV heads)
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Material: PETG, 100% infill preferred for durability on radiator heat
Why: The official SONOFF kit doesn’t include an adapter for older Drayton bayonet valves. I’ve got a 3D printer available to print the design.
If you’ve designed something similar or can help, please reply! Happy to credit you or donate if needed.